Personal portable audio device
Personal sound system
Piezoelectric transducer
Plug-in sound accessory for portable computers
Pluggable noise-controlling apparatus and method
Pop sound prevention module and speaker apparatus thereof
Power amplifier/loudspeaker interface
Power-off noise suppression circuit and associated methods...
Pressure wave transducing
Pressure wave transducing
Process for controlling the signal-to-noise ratio in noisy sound
Pulsating noise removal device