Kates J M
Center for Research in the Speech and Hearing Sciences, City University of New York, Graduate School, NY 10036.
J Rehabil Res Dev. 1990 Summer;27(3):279-94. doi: 10.1682/jrrd.1990.07.0279.
A time-domain digital simulation of an in-the-ear (ITE) hearing aid has been developed. The stimulation allows modeling of nonlinear effects such as compression and amplifier distortion in addition to linear processing and acoustics. The simulation includes a microphone, two-channel compression processing, an amplifier with clipping distortion, a receiver, an ear canal and ear drum, and feedback and direct sound transmission through the vent. Simulation results for a linear hearing aid are similar to those obtained for frequency-domain representations of the analog system. Examples of responses for nonlinear systems are also provided.
