Omni-directional loudspeaker system
Omniphonic microphone and loudspeaker system
One-point stereo microphone
One-size-fits-most hearing aid
Operation of magnetostrictive apparatus
Optical lever acoustic and ultrasound sensor
Optical sensor displacement monitor
Optical signal detection apparatus and method for preventing...
Optimized sub-speaker module and block-like constructed...
Oscillation detection
Oscillation echo canceller system
Oscillation prevention circuit
Oscillator for a flat loudspeaker, flat loudspeaker and vehicle
Oto-laryngeal communication system
Otoplastic
Otoplastic with an integrated module, in-ear otoplastic and...
Otoplasty and method for producing an otoplasty
Outdoor loudspeaker with passive radiator
Output stage for a hearing aid and method of driving output...
Overlay-coil speaker with direct coupling