Abstract
To analyze speech perception in children with pre-lingual hearing loss with auditory neuropathy spectrum disorder users of bilateral hearing aid. This is a descriptive and exploratory study carried out at the Research Center Audiological (HRAC/USP). The study included four children aged between 8 years and 3 months and 12 years and 2 months. Lists of monosyllabic words, two syllables, nonsense words and sentences, the Infant Toddler-Meaningful Auditory Integration Scale (IT-MAIS) and the Meaningful Use of Speech Scale (MUSS), hearing, and language categories were used. All lists were applied in acoustic booth, with speakers, in free field, in silence. The results showed an average 69.5% for the list of monosyllabic words, 87.75% for the list of two-syllable words, 89.92% for the list of nonsense syllables, and 92.5% for the list of sentences. The therapeutic process that includes the use of bilateral hearing aid was extremely satisfactory, since it allowed the maximum development of auditory skills.
Highlights
Hearing and communication skills are distinct features of the human existence, considered the greatest contributors for the well-being of any individual
Children aged under 18 years old, diagnosed with auditory neuropathy spectrum disorder (ANSD), verified by the absence or partial presence of answers in the research of the brainstem evoked auditory potential (BEAP), presence of otoacoustic emissions mentioned are identified in the first evaluation performed and/or cochlear microphonic presence and absence of acoustic reflexes;
All children in this study presented the recognition of words in an open set, compatible with the hearing category 6(14), and are fluent in oral language, presenting the development of language skills according to the category 5(13)
Summary
Hearing and communication skills are distinct features of the human existence, considered the greatest contributors for the well-being of any individual. The auditory sensory deprivation affects the development of the hearing function and the oral language, and may result in emotional, educational, social, and cultural implications[1]. The auditory neuropathy spectrum disorder (ANSD) is a dysfunction of the synapses of inner hair cells and/or auditory nerve. The individual with ANSD presents the functioning of the outer hair cells, the function of the vestibular-cochlear nerve is altered[2]. Clinical characteristics include from auditory thresholds within normality to severe and/or profound bilateral hearing loss[2,3,4]. It is important to highlight that the ANSD may be observed in individuals of all ages[5] and that there are many possibilities for the exact location of the alteration, the ANSD may be caused by failure of inner hair cells and/or the synaptic junction between these cells and the fibers of the VIII cranial pair, and/or the fibers of the VIII cranial pair themselves, and/ or in the biochemical basis and release of neurotransmitters, or even a combination of the structures mentioned[2]
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