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作者 Jessee, Sheena Kate
書名 Objective and subjective evaluation of wind noise reduction in digital hearing aids
國際標準書號 9781124620862
book jacket
說明 43 p
附註 Source: Dissertation Abstracts International, Volume: 72-07, Section: A, page: 2221
Adviser: Ayasakanta Rout
Thesis (Au.D.)--James Madison University, 2011
Wind noise is problematic for hearing aid users who enjoy outdoor activities. Not only is it annoying, it can create distortion by overloading the microphone and masking signals that hearing aid users desire to hear. Some hearing aid manufacturers offer wind noise reduction in addition to general noise reduction (WNR + NR) for clinicians to manipulate in their software. This study compares objective and subjective measures of wind noise reduction as well as subjective measure of intelligibility obtained using various hearing aid manufacturers and noise reduction settings while HINT sentences were played in the presence of constantly generated wind. Significant differences in the subjective and objective amount of noise present and perceived speech intelligibility was found both between manufacturers and between noise reduction settings for each manufacturer. Subjectively, intelligibility and noisiness were positively correlated (r=0.74, p>.001); conditions that were perceived to be the most intelligible were the same conditions that were perceived to be the noisiest. The perception of intelligibility and noisiness depended on the interaction of hearing aid manufacturer and noise reduction setting (p<.001, effect size=.77) for hearing aids with WN + NR and depended on both hearing aid manufacturer (p<.001, effect size=0.67) and noise reduction setting (p<.001, effect size=0.61) individually for hearing aids with only NR. Objective measures of gain reduction were negatively correlated with perceived noisiness (r=-0.87 to 0.92 -depending on frequency range, p>.001) of sentences; as the amount of gain reduction decreased, the perceived noisiness increased. In this study, the amount of noise perceived to be present and the intelligibility of speech depended on both hearing aid manufacturer and how noise reduction was programmed. The perception of noisiness and intelligibility were positively correlated, suggesting that when more gain reduction was applied sentences became less intelligible. Interestingly, for hearing aid manufacturers with NR only the perceived noisiness and intelligibility of sentences both increased when less noise reduction was applied. The results of this study have clinical implications for programming noise reduction settings in hearing aids when both wind and speech are present
School code: 1357
Host Item Dissertation Abstracts International 72-07A
主題 Health Sciences, Audiology
Speech Communication
Engineering, Computer
0300
0459
0464
Alt Author James Madison University. Communication Sciences and Disorders
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