Pressure gradient type microphone apparatus with acoustic termin

Procedure and device for facilitating audiovisual observation of

Process and apparatus for alternately switching radio signals ov

Process and device for mixing sound signals

Process for coding and decoding stereophonic spectral values

Process for enhancing the existing ambience, imaging, depth,...

Process for the production of a sound recording and a device for

Processing audio signals

Processing method for localization of acoustic image for...

Processing microphone generated signals to generate surround...

Pseudo stereophonic device

Pseudo-stereo circuit

Psycho acoustic pseudo-stereo fold back system

Pulsive noise removing apparatus