Abstract
The study of temporal characteristics of spatial hearing was carried out in 10 patients aged 68–83 years with sensorineural hearing loss (SNHL) (hearing loss 41–62 dB) using the method of constant stimuli and moving sound image modeling in a room with short reverberation time. Patients had no acute celebrovascular accidents, traumatic brain injuries and myocardial infarctions in their medical history. The moving sound images were created by linear variation of the amplitude of wideband noise burst sequences in the frequency range of 0.2–8 kHz, which were presented from two loudspeakers. According to the individual data obtained in the patients with SNHL of the 2nd -3rd degree, the threshold signal duration required for reliable determination of approaching and receding moving sound images varied within 300–800 ms. The average duration threshold in the group of SNHL patients was 400 ms, while in subjects with normal hearing it was 150 ms. Therefore, SNHL patients need more time for correct detection of the sound image motion direction than the subjects with normal hearing. These changes in perception may be due to the combined effect of the change in supra-threshold sound coding and the failure of the high-frequency binaural mechanism as a result of the hearing thresholds decrease.
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