Filterbanks for digital hearing aids must use significantly

different criteria than those designed for coding applications. For

digital hearing aids, the filterbank channel gains must be

adjustable over a large dynamic range to compensate for the

hearing loss. This adjustability violates the alias cancellation

properties of critically sampled filterbanks designed for coding.

This paper describes a filterbank designed exclusively for hearing

aid applications. Consideration will be given to the extremely

limited memory, low delay and low power requirements that

must be met in a typical hearing aid application.