Car stereo set
Car-mounted audio system
Carbon microphone linearization technique
Card type MEMS microphone
Card-type sound apparatus and electronic appliance provided...
Cartilage displacing bead, ridge, or key projection
Cascaded transducer array arrangement for control over an...
Case for containing electrical instrument
Casing for an electronic device and process for assembly of...
Casing of condenser microphone
Cassette type stereo speaker system
Ceiling loudspeaker
Ceiling microphone assembly
Ceiling speaker and signal source
Ceiling tile loudspeaker
Cellular phone
Cellular telephone, personal digital assistant with voice...
Center channel enhancement of virtual sound images
Center channel speaker having multiple interconnected backload a
Center mode control circuit