Safety device for a hearing aid

Sandwich switch construction for a hearing aid

Semiconductor amplifier with tube amplifier characteristics

Semiconductor emulation of tube amplifiers

Setting update apparatus of scene data in audio mixer

Shape adaptable in-the-ear hearing aid

Signal processing apparatus and acoustic reproducing apparatus

Signal processing unit

Signal processing unit

Simulated AM radio

Single bit per-voice dry/wet reverb control

Skin touch-controlled piezoelectric microphone

Solar powered hearing aid

Solar powered hearing aid

Solar powered hearing aid and reenergizer case

Solid state audio amplifier emulating a tube audio amplifier

Solid state circuit for emulating push-pull tube amplifier

Solid state circuit for emulating tube compression effect

Solid state emulation of vacuum tube audio power amplifiers

Solid state musical instrument amplifier with vacuum tube signal