Exam Preview for 36541: Novel Perceptual and Acoustic Evaluations o

Novel Perceptual and Acoustic Evaluations of Hearing Aid Technologies

Please note: exam questions are subject to change.

1. Perceptual evaluation of the impact of hearing aid signal processing on speech-in-noise performance is complicated by a mismatch between the: frequency content of speech and the acoustic change in the hearing aid. goals of the hearing aid and the goals of the listener. SNR required to engage signal processing and the SNR performance of the listener. the level of speech presentation and the sensitivity of the hearing aid microphones
2. Hearing aids engage in environmental classification as a means to provide data logging information to the wearer. inform the manufacturer how well the hearing aid is working. gauge battery usage to conserve battery life. guide decision making for automatic signal processing strategies.
3. The CNIT has a temporal resolution of about ____ seconds and a SNR resolution of about ____ dB. 2, 2 2, 0.5 0.5, 2 1, 1
4. Which acoustic parameter leads to the greatest differences in environmental classification among manufactures? Overall level Change in level over time Signal-to-noise ratio Gain of the hearing device
5. What would enable audiologists to better use information about the environmental classification of individual devices? Better hearing instrument test systems More research into differences among manufacturers Additional seminars in advanced signal processing More information from manufacturers on how it is used.