Dipole and monopole surround sound speaker system
Dipole speaker for producing ambience sound
Direct digital synthesis of FM signals
Directional decoding
Directional enhancement circuit
Discrete dynamic positioning of audio signals in a 360.degree. e
Discrete multi-channel/5-2-5 matrix system
Discrete parallel path modulation multiplexer
Discrete surround audio system for home and automotive...
Display device with sound module
Distortion cancel circuit in FM stereo
Distortion correcting AM stereo receiver with non-flat AGC
Distortion correcting AM stereo receiver with non-flat AGC
Dithered binaural system
Dual indicator circuit for tuning and stereo signals
Dual mode tone detector circuit
Dual purpose variable Q filter
Dual-chamber multi-channel speaker for surround sound stereo aud
Dual-tweeter loudspeaker
Dynamic acoustic rendering