Rodrigues, Paula Cristina; de Oliveira, Aline Cabral; Colafêmina, José Fernando; Menezes, Pedro de Lemos
May 2010
Revista CEFAC;2010, Vol. 12 Issue 3, p1
Academic Journal
Purpose: to compare the sound localization performance of hearing aids users, with the performance of normal hearing in the horizontal and sagittal planes, at 0.5, 2 and 4.5 Hz; to correlate the correct responses in sound localization tasks and the use time of hearing aids. Methods: eight normal hearing subjects and 20 hearing aid users were tested, subdivided into groups of 10 in-the-canal (ITC) hearing aid users and 10 behind-the-ear (BTE) hearing aid users. All subjects were tested with a sound localization device which had three types of square waves with fundamental frequencies at 0.5 kHz, 2 kHz and 4.5 kHz, at 70 dBA. Results: the rate of correct responses in sound localization tasks was 78.4%, 72.2% and 72.9% for normal hearing subjects, at 0.5 kHz, 2 kHz and 4.5 kHz, respectively, and 40.1%, 39.4%, and 41.7% for hearing aid users. As for the types of hearing aids, users of ITC type hit the correctly sound localization in 47.2% and user of BTE type in 37.4%. Conclusion: normal hearing subjects locate sound sources more efficiently than hearing aid users, and among these, those using the ITC type obtained better performance. Moreover, the time of use does not interfere with the performance for locating the sound sources.


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