Earphone device integrated with microphone
Electrical apparatus with electro-acoustic transducer
Electro-acoustic communications unit
Electro-acoustic transducer
Electroacoustic transducer
Electroacoustic transducer comprising a closing member for closi
Electroacoustic waveguide transducing
Electroacoustic waveguide transducing
Electroacoustical transducing
Electrodynamic acoustic transducer
Externally ported loudspeaker enclosure
Fidelity speaker
Film-type audio output apparatus
Fireplace accessory
Fluid coupled subwoofer acoustic enclosure system
Folded coaxial transmission line loudspeaker
Folded coaxial transmission line loudspeaker
Frequency selective acoustic waveguide damping
Hearing aid
Hemispherical speaker system