Magnetic drive apparatus and method for manufacturing coil that

Magnetic fluid loudspeaker assembly with ported enclosure

Magnetic membrane suspension

Magnetic resonance imaging compatible audio headset

Magnetic speaker grill

Magnetic structure for an ironless...

Magnetic system for dynamic loudspeaker

Magnetic, variable-volume sound producing device

Magnetically shielded electromagnetic acoustic transducer

Magnetically suspended acoustical speaker

Magnetless speaker

Mass excited acoustic device

Means for affixing an ornamental sculpture to a sound emitting d

Mechanical acoustic crossover network and transducer therefor

Mechanical-vibration-cancelling piezo ceramic microphone

Mechanically tunable diaphragm using nickel titanium memory...

Mechanism of vibration type microphone

Membrane support system

Membrane support system

MEMS microphone package with RF insensitive MEMS microphone...