Seatback audio controller

Self-contained active sound reproducer with switchable control u

Shaping of automatic audio crossfade

Signal compressing and transmitting apparatus

Signal compressing circuit

Signal conditioning circuit for compressing audio signals

Signal generating module

Signal processing circuit for audio apparatus

Signal processing circuit in an audio device

Signal processing device

Signal processor

Signal responsive automatic control for audio equipment

Signal separator

Signal strength adapter circuit

Simultaneous two-way communication apparatus using ear...

Softclip method and apparatus

Sound apparatus, method of changing sound characteristics,...

Sound apparatus, method of changing sound characteristics,...

Sound leveling system using output slope control

Sound or voice responsive timepiece