Spectral transposition of a digital audio signal

Speech intelligibility enhancement

Speech processor

Structure of battery receiving chamber

Supersonic bone conduction hearing aid and method

Switched amplifier

System and method for creating auditory sensations

System for transcription and playback of sonic signals

Touch sensitive hearing aid volume control circuit

Transducer with ear canal pickup

Transmitting/receiving apparatus and communication system using

Transmitting/receiving apparatus for use in telecommunications

Ultrasonic frequency expansion processor

Unnatural reverberation

Variable recovery time circuit for use with wide dynamic range a

Visual aid for the hearing impaired

Voice-controlled hearing aid

Wearable digital hearing aid and method for improving hearing ab

Wideband assisted reverberation system

Zinc-air dry cell holder and hearing aid that uses it