Coaxial speaker unit

Coaxial speaker with step-down ledge to eliminate sound wave...

Coil for an electroacoustic transducer

Coincident source stereo speaker

Collapsible hearing device

Collapsible image derived differential microphone

Collapsing paraboloid dish and method

Collar microphone

Comb sense microphone

Comb sense microphone

Combination inertia type audio transducer and loudspeaker

Combination multiple supported variable position audio intake co

Combination multiple supported variable position audio intake co

Combination of a speaker case and a connector for connecting...

Combination speaker enclosure mounting structure

Combined headphone set and portable speaker assembly

Combined receiver and speaker

Combined speaker/dome lamp

Comfortable earphone cushions

Communication device with receiver enclosure