Noise Test Sentences Research Articles

Speech discrimination with separated signal sources and sound localization with speech stimuli : Learning effects and reproducibility

Binaural hearing enables better speech comprehension in noisy environments and is necessary for acoustic spatial orientation. This study investigates speech discrimination in noise with separated signal sources and measures sound localization. The aim was to study characteristics and reproducibility of two selected measurement techniques which seem to be suitable for description of the aforementioned aspects of binaural hearing. Speech reception thresholds (SRT) in noise and test-retest reliability were collected from 55normal-hearing adults for aspatial setup of loudspeakers with angles of ± 45° and ± 90° using the Oldenburg sentence test. The investigations of sound localization were conducted in asemicircle and fullcircle setup (7 and 12 equidistant loudspeakers). SRT (S-45N45: -14.1 dB SNR; S45N-45: -16.4 dB SNR; S0N90: -13.1 dB SNR; S0N-90: -13.4 dB SNR) and test-retest reliability (4 to 6 dB SNR) were collected for speech intelligibility in noise with separated signals. The procedural learning effect for this setup could only be mitigated with 120 training sentences. Significantly smaller SRT values, resulting in better speech discrimination, were found for the test situation of the right compared to the left ear. RMS values could be gathered for sound localization in the semicircle (1,9°) as well as in the fullcircle setup (11,1°). Better results were obtained in the retest of the fullcircle setup. When using the Oldenburg sentence test in noise with spatially separated signals, it is mandatory to perform atraining session of 120sentences in order to minimize the procedural learning effect. Ear-specific SRT values for speech discrimination in noise with separated signal sources are required, which is probably due to the right-ear advantage. Atraining is recommended for sound localization in the fullcircle setup.

Successful hearing preservation and improved subjective sound quality with the flexible 28-mm electrode array

IntroductionFlexible electrode arrays have shown to be an effective solution to ensure atraumatic insertion. However, flexible full-length electrodes are not suited for patients with smaller cochleae. Therefore, this study aimed to evaluate short-term and medium-term hearing preservation (HP) in patients with low-frequency residual hearing (LFRH) who were implanted with a flexible 28-mm electrode array and who did not meet the indication criteria for electric-acoustic stimulation (EAS).MethodsHP was determined based on the pure-tone audiogram of the implanted ear. A bisyllable sentence test was used to assess speech perception in quiet and in noise. The hearing implant sound quality index (HISQUI19) evaluated self-reported hearing quality. The tests were conducted pre- and post-operatively, at first fitting, and at 1, 3, 6, and 12 months after first fitting.ResultsAt 12 months post first fitting, 2 patients had complete HP; 4 patients had partial HP. Speech perception scores improved in all patients of the study. The mean scores on the bisyllable sentence test in noise significantly increased from 30% pre-operatively to 62% 6 months post first-fitting and to 68% 12 months post first-fitting. The mean score of the HISQUI19 improved from 40.56 (poor) pre-operatively to 72.56 (moderate) 1 month post first-fitting and to 90.29 (good) 12 months post first-fitting.ConclusionThe 28-mm flexible electrode array facilitates atraumatic surgery and HP and results in improved speech perception and subjective sound quality scores.

The adaptive use of the Freiburg monosyllabic speech test in noise with a reduced number of test lists

Considering the different calibration and masking of the noise, the adaptive Freiburg monosyllabic speech test in noise (aFBE-S) and the Oldenburg sentence test in noise (OLSA-S) were shown to be comparable with respect to the accuracy of both tests in a previous study. However, the time requirement of the aFBE-S was significantly greater than that of the OLSA-S due to the adaptive measurement method. The purpose of this study is to theoretically determine whether the aFBE-S can be used with fewer test lists, given the low scatter of results, and to compare the results with those of the OLSA-S. Using the results of 40 otologically healthy subjects who had already been tested in randomized order with the OLSA-S and aFBE-S, the mean difference of the 95 % confidence interval (95 % CI) of the signal-to-noise ratio for 50% speech understanding (S/N50) of the aFBE-S was calculated for three, four, and five test lists instead of 7.5. In addition, the time required for the reduced number of test lists was determined and the results were examined in comparison with those of the OLSA-S. In each case, no significant difference between the difference mean of the 95 %-CI of the S/N50 of the original aFBE-S, the aFBE-S shortened to 3, 4, or 5 test lists and the OLSA-S could be found. The time required for the aFBE-S with a reduced number of test lists was significantly less than for the OLSA-S in each case. The aFBE-S is not inferior with a reduced number of test lists in comparison to the OLSA-S. This would allow to use the shortened aFBE-S theoretically.

The Benefit of Hearing Aids as Measured by Listening Accuracy, Subjective Listening Effort, and Functional Near Infrared Spectroscopy.

There is broad consensus that listening effort is an important outcome for measuring hearing performance. However, there remains debate on the best ways to measure listening effort. This study sought to measure neural correlates of listening effort using functional near-infrared spectroscopy (fNIRS) in experienced adult hearing aid users. The study evaluated impacts of amplification and signal-to-noise ratio (SNR) on cerebral blood oxygenation, with the expectation that easier listening conditions would be associated with less oxygenation in the prefrontal cortex. Thirty experienced adult hearing aid users repeated sentence-final words from low-context Revised Speech Perception in Noise Test sentences. Participants repeated words at a hard SNR (individual SNR-50) or easy SNR (individual SNR-50 + 10 dB), while wearing hearing aids fit to prescriptive targets or without wearing hearing aids. In addition to assessing listening accuracy and subjective listening effort, prefrontal blood oxygenation was measured using fNIRS. As expected, easier listening conditions (i.e., easy SNR, with hearing aids) led to better listening accuracy, lower subjective listening effort, and lower oxygenation across the entire prefrontal cortex compared to harder listening conditions. Listening accuracy and subjective listening effort were also significant predictors of oxygenation.

Benefits of unilateral cochlear implantation in adults with asymmetric hearing loss: Audiologic and patient-related outcome measures

PurposeTo investigate the benefits of cochlear implantation in adults with single-sided deafness (SSD) and asymmetric hearing loss (AHL). Study designProspective within-subjects repeated-measures. SettingTwo tertiary cochlear implant centers. PatientsFourteen adults with severe-to-profound sensorineural hearing loss in the worse hearing ear and up to moderate SNHL in the better hearing ear. InterventionCochlear implantation in the worse hearing ear. Main outcome measuresConsonant-nucleus-consonant (CNC) test, AzBio sentence test in noise, and lateralization testing were conducted preoperatively and at 3-, 6-, and 12-months post-activation. Patient-related outcomes were measured using the Speech, Spatial, and Qualities of Hearing Scale and Glasgow Benefit Inventory. Tinnitus Handicap Inventory was administered to subjects with tinnitus. ResultsMean length of hearing loss in the worse hearing ear was 3.5 years. The mean CNC change scores from baseline were 54.8, 55.9, and 58.9 percentage points at 3-, 6-, and 12-months (p < 0.001). AzBio sentence test in noise demonstrated improved scores in all spatial configurations, although statistically significant in S0N0 (speech front, noise front) only. Lateralization testing showed significant improvement of 22.9, 24.5, and 24.0 percentage points at 3-, 6-, and 12 months post-activation (p = 0.002). All patient-related outcome measures revealed significant improvement. ConclusionThis study demonstrates improved speech perception in noise, sound lateralization, quality of life, and reduction in tinnitus perception in adults with SSD/AHL who undergo cochlear implantation. Our results add to the growing body of evidence that cochlear implant should be offered to this population.

Рsychoacoustic testing to assess the functional maturation of the central audiotory system

The age-appropriate development of the central auditory system is crucial for a child’s normal auditory and speech development. If there are any issues with this development, it can lead to central auditory processing disorders (APD) and problems with psychoverbal and general development. Psychoacoustic testing is an informative and accessible diagnostic tool for identifying signs of APD. This testing can be performed on children as young as four years old, provided there are normative data available for different age groups. The purpose of this study was to assess the functional state of the central auditory system using psychoacoustic methods in healthy children of different ages. Materials Methods. We examined 125 healthy full-term children between the ages of 4 and 17 years who had normal peripheral hearing and no speech, language, cognitive, or academic problems. The children were divided into five age groups: 4–5 years 11 months, 6–7 years 11 months, 8–9 years 11 months, 10–11 years 11 months, and 12 years and older. In addition to traditional audiological examinations, all children underwent tests to assess the functional state of the central parts of the auditory system, including tests for the perception of rhythmic sequences of stimuli, Random Gap Detection Test, monaural low redundant speech testing in quiet and in noise, alternating binaural speech testing, dichotic digits test, and a simplified version of the Russian matrix sentence test in noise (RUMatrix). The results showed that the tests used were sensitive to the functional state of various structures of the central auditory system, and signs of maturation in the “bottom-up” direction were demonstrated as the children grew older. The rate of evolutionary processes varied depending on the age group of the subjects. It was also shown that the morphofunctional development of the central auditory system is not completed by adolescence. Conclusion. These findings can be used to differentiate between the immaturity of the central auditory system, APD, and speech-language disorders of different types in children of different ages. Overall, this study emphasizes the importance of early detection and intervention for any issues related to the central auditory system in children.

Assessment of High-Variability Speech Recognition in Adult Cochlear Implant Users using PRESTO.

Speech recognition in adult cochlear implant (CI) users is typically assessed using sentence materials with low talker variability. Little is known about the effects of talker variability on speech recognition in adult CI users, the factors underlying individual differences in speech recognition with high talker variability, or how sentence materials with high talker variability could be utilized clinically. To examine the effects of talker variability on sentence recognition in adult CI users, using sentences from the Perceptually Robust English Sentence Test Open-Set (PRESTO), and to examine the relation between working memory capacity and high-variability speech recognition. Postlingually deafened adult CI users and adults with self-reported normal hearing (NH) under CI simulation completed sentence recognition tests that contained varying levels of talker variability, including Hearing in Noise Test (HINT; low-variability), AzBio (moderate-variability), and PRESTO sentences (high-variability). The tasks were completed in both quiet and multitalker babble (MTB). For the adult CI users only, the relation between sentence recognition accuracy and working memory capacity was assessed. Twenty postlingually deafened adult CI users and 35 NH adults under 8-channel acoustic noise-vocoder simulations of CI hearing. In both CI and NH groups, performance decreased as a function of increased talker variability, with the best scores obtained on HINT (low-variability), then AzBio (moderate-variability), followed by PRESTO (high-variability) in quiet. In MTB, performance was significantly lower on PRESTO sentences, compared with HINT and AzBio sentences, which were not significantly different. Working memory capacity in the CI users was related to sentence recognition accuracy across all materials and conditions. Findings from the current study suggest that the increased talker variability in the PRESTO sentence materials has a detrimental effect on speech recognition in both adult CI users and NH listeners under CI simulation, particularly when speech is further degraded by MTB. For adult CI users, working memory capacity contributes to speech recognition abilities. Sentence recognition testing with high-variability, multitalker materials, as in PRESTO, provides robust assessment of speech recognition abilities for research and clinical application, generating a wide range of scores for evaluating individual differences without ceiling effects when compared with conventional low-variability sentences.

Speech Discrimination Outcomes in Adult Cochlear Implant Recipients by Primary Language and Bilingual Hispanic Patients.

Compare cochlear implant (CI) outcomes in English speakers, Spanish speakers, and bilingual Hispanics. Retrospective review. Academic tertiary care center. Eighty-five postlingually deafened adults unilaterally implanted between January 2014 and December 2018 were stratified by primary language. Primary outcomes were: (1) English consonant-nucleus-consonant and Spanish bisyllables word tests in quiet, and (2) English AzBio and Latin American Hearing In Noise Test (LA-HINT) sentence tests in quiet and in noise at multiple time-intervals postactivation. In the respective languages, primary Spanish speakers(n = 24), and English speakers (n = 61) experienced the greatest increases in average scores for word and sentence tests in quiet during the first 6 months postactivation, with gradual increases in average scores over time. English speakers performed significantly worse on AzBio tests in noise, compared to quiet, while the addition of noise did not significantly affect average LA-HINT scores in Spanish speakers across multiple time intervals. An early ceiling effect was also demonstrated for LA-HINT. Although not significant, bilingual Hispanics (n = 12) had lower average AzBio in quiet scores than English speakers and higher average LA-HINT in quiet scores than the Spanish speakers across multiple time intervals. English and Spanish CI users experienced the greatest increases in speech understanding in quiet the first few months after implant activation. An early ceiling effect is demonstrated with LA-HINT, indicating LA-HINT is not appropriate for evaluating longitudinal CI outcomes in Spanish speakers. Bilingual Hispanics represent a unique group, and further investigations are necessary to understand speech perception patterns in both languages and develop the best CI test strategies for these individuals.

Association of Self-Reported Coping Strategies With Speech Recognition Outcomes in Adult Cochlear Implant Users.

To characterize the degree to which individual coping strategies may influence speech perception after cochlear implantation. Retrospective cohort study. Tertiary referral center. Adult, postlingually deaf cochlear implant recipients. The Coping Orientation to Problems Experience inventory, a validated, multidimensional self-reported coping scale, was administered preoperatively. Speech perception was measured using consonant-nucleus-consonant (CNC) phoneme and word scores, AzBio sentence accuracy in quiet and noise, and Hearing in Noise Test sentences in quiet preoperatively and at 1, 3, and 6 months postoperatively. Quality of life was measured with the Hearing Implant Sound Quality Index and the Nijmegen Cochlear Implant Questionnaire. Thirty-six patients were included in this study. Mean age at surgery was 70.7 ± 11.4 years. Acceptance was associated with a decreased AzBio in noise score in the 6 months after CI (regression coefficient b = -0.05; 95% confidence interval [CI], -0.07 to -0.03; p < 0.01). Denial was associated with a decreased AzBio in quiet score (b = -0.05; 95% CI, -0.09 to -0.01; p < 0.05), whereas humor was associated with an increased AzBio in quiet score (b = 0.02; 95% CI, 0.01 to 0.04; p < 0.05). Humor was also associated with an increased Hearing in Noise Test score (b = 0.05; 95% CI, 0.02 to 0.07; p < 0.05). Denial was associated with decreased CNC word (b = -0.04; 95% CI, -0.06 to -0.02; p < 0.01) and phoneme (b = -0.04; 95% CI, -0.07 to -0.02; p < 0.01) scores, whereas substance use was associated with increased CNC word (b = 0.03; 95% CI, 0.01 to 0.05, p < 0.01) and phoneme (b = 0.04; 95% CI, 0.02 to 0.06; p < 0.01) scores. Scores on self-reported quality of life measures were not significantly correlated with coping strategies. A variety of adaptive and maladaptive coping strategies are used by postlingually deaf adult cochlear implant users. Denial and acceptance may be more predictive of poor speech performance, whereas humor and substance use may be more predictive of improved speech performance.

Longitudinal Speech Recognition Changes After Cochlear Implant: Systematic Review and Meta-analysis.

To examine patterns of change and plateau in speech recognition scores in postlingually hearing impaired adult cochlear implant recipients. The study also examines variations in change patterns for different speech materials and testing conditions. Used systematic review with meta-analysis. Articles in English reporting speech recognition scores of adults with postlingual hearing loss at pre-implantation and at least two post-implantation time points were included. Statistically significant changes were determined by meta-analysis and the 95% confidence interval. A total of 22 articles representing 1954 patients were included. Meta-analysis of mean difference demonstrated significant improvements in speech recognition score for words in quiet (37.4%; 95% confidence interval [34.7%, 40.7%]), sentences in quiet (49.4%; 95% confidence interval [44.9%, 53.9%]), and sentences in noise (30.8%; 95% confidence interval [25.2%, 36.4%]) from pre-op to 3 months. Scores continued to increase from 3 to 12 months but did not reach significance. Similarly, significant improvements from pre-op to 3 months were observed for consonant nucleus consonant (CNC) words in quiet (37.1%; 95% confidence interval [33.8%, 40.4%]), hearing in noise test (HINT) sentences in quiet (46.5%; 95% confidence interval [37.0%, 56.0%]), AzBio sentences in quiet (45.9%; 95% confidence interval [44.2%, 47.5%]), and AzBio sentences in noise (26.4%; 95% confidence interval [18.6%, 34.2%]). HINT sentences in noise demonstrated improvement from pre-op to 3 months (35.1%; 95% confidence interval [30.0%, 40.3%]) and from 3 to 12 months (15.5%; 95% confidence interval [7.2%, 23.8%]). Mean speech recognition scores demonstrate significant improvement within the first 3 months, with no further statistically significant improvement after 3 months. However, large individual variation should be expected and future research is needed to explain the sources of these individual differences. Laryngoscope, 133:1014-1024, 2023.

Recognition of English vowels, consonants, words, and sentences for Chinese college students

The goals of this study were to first, investigate the recognition of several types of English speech sounds such as vowels, consonants, words, and sentences in quiet and long-term speech-shaped (LTSS) noise for Chinese college students; second, examine relationship among the perception of these speech materials, e.g., whether students with better sentence recognition also showed better phonemic perception. Speech stimuli included twelve isolated English vowels, twenty-one English consonants in the /aCa/ context, NU6 words, the coordinate response measure (CRM), Hearing in noise test (HINT) sentences, and IEEE sentences. Preliminary data analysis indicated that at the phonetic level, Chinese students performed significantly better in consonant identification than in vowel identification; at the word level, students did significantly with CRM than NU6; and at the sentence level, students had significantly higher recognition scores for HINT sentences than for IEEE sentences. The correlations among the recognition of these speech materials will examined and discussed. [Work supported by China National Natural Science Foundation 31628009.]

The Relationship Between Self-Perceived Hearing Ability and Binaural Speech-in-Noise Performance in Adults With Normal Pure-Tone Hearing

PurposeThis study examined the relationship between self-perceived hearing abilities and binaural speech-in-noise performance in young to middle-age adults with normal pure-tone hearing.MethodSixty-six adults with normal hearing (thresholds ≤ 25 dB HL at 250–8000 Hz) participated. Self-perceived hearing abilities were assessed using the Adult Auditory Performance Scale (AAPS). The AAPS provides a single global score of self-perceived hearing abilities and individual subscale scores for six listening conditions, namely, Quiet, Ideal, Noise, Multiple Inputs, Auditory Memory, and Auditory Attention. Binaural speech-in-noise performance was measured with the Listening in Spatialized Noise–Sentences Test (LiSN-S).ResultsResults revealed significant correlations between the AAPS and the LiSN-S. Listeners who scored higher on the AAPS (greater self-perceived hearing difficulty) performed poorer on the LiSN-S. The strongest correlations were observed between the AAPS Noise subscale score and the LiSN-S low- and high-cue conditions. Age was significantly correlated with both pure-tone hearing and the LiSN-S spatial advantage, with older participants exhibiting poorer thresholds and smaller spatial advantages. Pure-tone hearing was also significantly correlated with binaural speech-in-noise performance. Listeners with poorer thresholds performed poorer across multiple LiSN-S conditions. Linear regression revealed that a significant amount of the variance in LiSN-S performance was accounted for by pure-tone hearing as well as the AAPS global score and Noise subscale score.ConclusionsResults demonstrate a clear relationship between an individual's self-perceived hearing ability and their binaural speech-in-noise performance. In addition, minimal threshold elevation within the normal range and age (i.e., middle adulthood) had a negative impact on binaural speech-in-noise performance. The results support the inclusion of speech-in-noise testing for all patients, even those whose pure-tone hearing falls within the traditional normal range.

Functional results with active middle ear implant or semi-implantable bone conduction device in patients with comparable hearing loss

Objective In patients with conductive (CHL) or mixed hearing loss (MHL), hearing rehabilitation with an implantable hearing system, active middle ear implant (AMEI) or a semi-implantable bone-conduction device (SIBCD), is an option when conventional hearing aids are insufficient, or patients are unable to wear them. Design Retrospective analysis of 20 consecutive patients (24 implants) with a comparison of demographic characteristics and audiometric results (air-bone gap = ABG, effective hearing gain = EHG, functional hearing gain = FHG, Freiburg Monosyllabic Test in quiet, Oldenburg Sentence Test in noise = OLSA). Study sample Patients, eligible for both devices, who received either AMEI or SIBCD due to CHL or MHL. Results Analysis showed no significant differences in post-operative functional hearing results between the group of AMEI vs. SIBCD (ABG-reduction: 31.6 ± 12.4 dB HL vs. 28.0 ± 11.8 dB HL; p = 0.702; EHG: −1.6 ± 7.7 dB HL vs. −1.2 ± 4.2 dB HL; p = 0.090; FHG: 33.4 ± 12.6 dB HL vs. 26.1 ± 11.7 dB HL; p = 0.192; Freiburg: 83.0 ± 15.6% vs. 83.6 ± 14.2%; Freiburg-improvement: 57.7 ± 26.8% vs. 68.2 ± 19.7%; p = 0.294; OLSA: −2.7 ± 3.0 SNR vs. −1.4 ± 3.6 SNR; OLSA-improvement: 2.6 ± 2.1 dB vs. 3.7 ± 2.8 dB; p = 0.323). Four patients had the AMEI explanted due to insufficient functioning and later received a SIBCD. Conclusions Due to more challenging anatomical conditions, a surgical technique for the AMEI is more complex. However, functional results are comparable to the SIBCD. Therefore, proper patient counselling and cautious choice of the device are mandated before surgery.

Social observation increases the cardiovascular response of hearing-impaired listeners during a speech reception task

Certain cardiovascular measures allow for distinction between sympathetic and parasympathetic nervous system activity. Applied during listening, these measures may provide a novel and complementary insight into listening effort. To date, few studies have implemented cardiovascular measures of listening effort and seldom have these included hearing-impaired participants. These studies have generally measured changes in cardiovascular parameters while manipulating environmental factors, such as listening difficulty. Yet, listening effort is also known to be moderated by individual factors, including the importance of performing successfully. In this study, we aimed to manipulate success importance by adding observers to the traditional laboratory set-up. Twenty-nine hearing-impaired participants performed a speech reception task both alone and in the presence of two observers. Auditory stimuli consisted of Danish Hearing in Noise Test (HINT) sentences masked by four-talker babble. Sentences were delivered at two individually adapted signal-to-noise ratios, corresponding to 50 and 80% of sentences correct. We measured change scores, relative to baseline, of pre-ejection period, two indices of heart rate variability, heart rate and blood pressure (systolic, diastolic, and mean arterial pressure). After each condition, participants rated their effort investment, stress, tendency to give up and preference to change the situation to improve audibility. A multivariate analysis revealed that cardiovascular reactivity increased in the presence of the observers, compared to when the task was performed alone. More specifically, systolic, diastolic, and mean arterial blood pressure increased while observed. Interestingly, participants’ subjective ratings were sensitive only to intelligibility level, not the observation state. This study was the first to report results from a range of different cardiovascular variables measured from hearing-impaired participants during a speech reception task. Due to the timing of the observers’ presence, we were not able to conclusively attribute these physiological changes to being task related. Therefore, instead of representing listening effort, we suggest that the increased cardiovascular response detected during observation reveals increased physiological stress associated with potential evaluation.

Diagnostic Accuracy of the AzBio Speech Recognition in Noise Test.

Purpose The goal of this study was to determine the ability of the AzBio speech recognition in noise (SRN) test to distinguish between groups of participants with and without a self-reported SRN disorder and a self-reported signal-to-noise ratio (SNR) loss. Method Fifty-four native English-speaking young adults with normal pure-tone thresholds (≤ 25 dB HL, 0.25-6.0 kHz) participated. Individuals who reported hearing difficulty in a noisy restaurant (Reference Standard 1) were placed in the SRN disorder group. SNR loss groups were created based on the self-report of the ability to hear Hearing in Noise Test (HINT) sentences in steady-state speech-shaped noise, four-talker babble, and 20-talker babble in a controlled listening environment (Reference Standard 2). Participants with HINT thresholds poorer than or equal to the median were assigned to the SNR loss group. Results The area under the curve from the receiver operating characteristics curves revealed that the AzBio test was not a significant predictor of an SRN disorder, or an SNR loss using the steady-state noise Reference Standard 2 condition. However, the AzBio was a significant predictor of an SNR loss using the four-talker babble and 20-talker babble Reference Standard 2 conditions (p < .05). The AzBio was a significant predictor of an SNR loss when using the average HINT thresholds across the three Reference Standard 2 masker conditions (area under the curve = .79, p = .001). Conclusions The AzBio test was not a significant predictor of a self-reported SRN disorder or a self-reported SNR loss in steady-state noise. However, it was a significant predictor of a self-reported SNR loss in babble noise and the average across all noise conditions. A battery of reference standard tests with a range of maskers in a controlled listening environment is recommended for diagnostic accuracy evaluations of SRN tests.

Factor Analysis on Multiple Auditory Processing Assessment–2 and Listening in Spatialized Noise–Sentences Test in Children

Introduction There is need for greater understanding of tests used in assessing all aspects of auditory processing disorder (APD). This is important so that specific deficits can be identified and later remediated with the smallest possible test battery. The American Speech-Language-Hearing Association (ASHA) recommends five areas/domains for behavioral assessment: (a) temporal, (b) binaural (dichotic) separation/integration, (c) monaural low redundancy, (d) binaural interaction/localization/lateralization, and (e) auditory discrimination. Multiple-factor studies support the first three domains, which are most often used for APD assessment and which can be measured in a test battery normed within the United States (Multiple Auditory Processing Assessment-2 [MAPA-2]). This study was designed to determine if factored results from children would clarify whether a behavioral test (Listening in Spatialized Noise-Sentences Test [LiSN-S]) would factor within one of the first three domains or be separate, possibly within the fourth domain, binaural interaction. Method Fifty-one 8- and 9-year-olds with normal development and normal otoscopy and hearing responses bilaterally from 500 to 4000 Hz at 20 dB HL were recruited. Two sets of APD tests were administered: MAPA-2 and LiSN-S. Results Results verified the expected three-factor structure for MAPA-2. LiSN-S did not factor within one of those three, suggesting that some processes involved in the LiSN-S tasks require interactions between the two ears different from those involved in dichotic perception and thus better belong in the ASHA binaural interaction/lateralization domain. Conclusions Auditory processing abilities are sufficiently independent of each other that test batteries spanning the first three ASHA domains are not sensitive to at least some abilities in the fourth domain. This additional factor evidence is helpful. Future research should examine the utility of measuring additional factors within APD in order to achieve the most efficient and comprehensive test battery.

Hearing Aid Uptake, Benefit, and Use: The Impact of Hearing, Cognition, and Personal Factors.

Purpose The purpose of this study was to explore the effects of hearing, cognition, and personal factors on hearing aid (HA) uptake, use, and benefit. Method Eighty-five older adults aged 60-80 years (M = 70.23, SD = 5.17) participated in the study. Hearing was assessed using pure-tone audiometry and the Listening in Spatialised Noise-Sentences test. Cognition was measured using the Cogstate Brief Battery and the Cogstate Groton Maze Learning task. Personal demographics were recorded from participants' answers on a series of take-home questionnaires. HA benefit and use was subjectively reported at 3 and 6 months post HA fitting for those who chose to use HAs. Results Stepwise-regression and mixed-effects models indicated that stronger psychomotor function predicted greater reported use of HAs at 3 and 6 months post HA fitting. Greater family interaction scores also predicted greater HA use at 3 months after fitting. Participants who chose to be fitted with HAs had significantly poorer self-reported health and poorer audiometric thresholds. Poorer hearing was also significantly related with greater reported HA benefit. Conclusions A combination of cognitive, psychosocial factors and hearing impacted HA outcomes for the older Australians in this study. Self-reported HA use was significantly greater in participants with better psychomotor function. Furthermore, those with poorer self-reported health were more likely to choose to use HAs. These factors should be considered in audiological rehabilitation to best maximize patient HA outcomes.

A convergent validity study: Listening in Spatialized Noise-Sentences (LiSN-S) test and the Hearing in Noise Test (HINT)

Objectives The primary purpose of this study was to compare Listening in Spatialized Noise – Sentence (LiSN-S) test and the Hearing in Noise Test (HINT) thresholds in order to determine if the two tests measure the same construct (convergent validity). The secondary purpose was to determine performance differences between the two test protocols. The third purpose was to determine the relationships between quiet measures (pure-tone average [PTA] and HINT Quiet thresholds) vs. speech-in-noise performances. Design Statistical analyses included descriptive statistics, Spearman rho statistic, repeated measures analysis of variance (ANOVA) and linear mixed model analyses. Study sample: Fifty-six young adults with normal PTAs (≤15 dB HL for 0.5–4.0 kHz) participated in this study. Results No statistically significant relationships were found between LiSN-S and HINT measures (poor convergent validity). However, statistically significant relationships were found between the quiet measures (HINT Quiet thresholds and average PTA(0.5–4.0 kHz)) vs. the LiSN-S (same and different voices) ±90° performances. Conclusion LiSN-S performances in two-talker babble cannot be generalized to the ability to recognise HINT sentences in steady-state speech-shaped noise, and vice versa. The results imply that LiSN-S ± 90° thresholds were influenced by hearing sensitivity or by supra-threshold distortions that co-vary with hearing sensitivity.

Formant frequency discrimination with a fine structure sound coding strategy for cochlear implants

Recent sound coding strategies for cochlear implants (CI) have focused on the transmission of temporal fine structure to the CI recipient. To date, knowledge about the effects of fine structure coding in electrical hearing is poorly charactarized.The aim of this study was to examine whether the presence of temporal fine structure coding affects how the CI recipient perceives sound. This was done by comparing two sound coding strategies with different temporal fine structure coverage in a longitudinal cross-over setting. The more recent FS4 coding strategy provides fine structure coding on typically four apical stimulation channels compared to FSP with usually one or two fine structure channels.34 adult CI patients with a minimum CI experience of one year were included. All subjects were fitted according to clinical routine and used both coding strategies for three months in a randomized sequence. Formant frequency discrimination thresholds (FFDT) were measured to assess the ability to resolve timbre information. Further outcome measures included a monosyllables test in quiet and the speech reception threshold of an adaptive matrix sentence test in noise (Oldenburger sentence test). In addition, the subjective sound quality was assessed using visual analogue scales and a sound quality questionnaire after each three months period.The extended fine structure range of FS4 yields FFDT similar to FSP for formants occurring in the frequency range only covered by FS4. There is a significant interaction (p = 0.048) between the extent of fine structure coverage in FSP and the improvement in FFDT in favour of FS4 for these stimuli. FS4 Speech perception in noise and quiet was similar with both coding strategies. Sound quality was rated heterogeneously showing that both strategies represent valuable options for CI fitting to allow for best possible individual optimization.

Modulation masking release reduction as a function of time-compressed speech

ABSTRACT Purpose: to investigate the magnitude of the modulation masking release in sentence recognition as a function of compression level and modulation rate. Methods: sentences of the Brazilian Portuguese version of the Hearing in Noise Test sentences were used as stimulus. The sentence recognition thresholds were established as a function of speech compression level (0%, 33%, and 50%) in steady and modulated noise at different modulation rates (4, 10, 32 Hz). The analysis of variance was performed for repeated measures, using the 5% significance level. Results: sentence recognition thresholds were higher for higher compression levels in the different types of noise. However, thresholds were smaller for modulated noises. Also, the magnitude of modulation masking release decreased as speech compression level increased. Nevertheless, no difference was observed in compressed speech between different noise modulation rates, in relation to the speech compression level. Conclusion: the magnitude of the modulation masking release decreased as the speech time-compression increased. Also, the reductions in modulation masking release, in relation to the speech time-compression level, did not differ between the masking-noise modulation rates (4, 10, and 32 Hz).