Porous ferrite wave absorber
Porous metal bodies used for attenuating aviation turbine noise
Porous single expansion ramp
Port devices for bass-reflex speaker enclosures
Portable acoustic diffuser for portable generators
Portable acoustic hearing enhancement device
Portable acoustical shell structure
Portable acoustical shield and sound enhancing closure
Portable adjustable acoustic absorber
Portable information terminal device
Portable information terminal device
Portable loudspeaker apparatus for use in live performances
Portable loudspeaker/directional microphone peripheral
Portable seismic energy source
Portable sound recording device
Portable sound speaker system
Portable speaker for vehicles
Portable terminal apparatus
Portable underwater signalling transducer
Ported automotive speaker enclosure apparatus and method