Panel absorbing low, mid and high frequency acoustic waves,...

Passive selective headset

Perceptual coding of audio signals

Percussion instrument mounting apparatus

Perforated polymer core-metal laminates

Perforated skin for acoustic element, acoustic element and...

Personal active acoustic attenuation process and device,...

Pest control device

Phased treatment noise suppressor for acoustic duct...

Photoetching of acoustic lenses for aip

Piezoelectric acoustic alarm

Piezoelectric element array echography probe

Piezoelectric signaling device

Plain surface acoustical product

Pneumatic horn

Polyhedral directional transducer array

Porous acoustic element and a method of controlling...

Porous metal bodies used for attenuating aviation turbine noise

Portable air horn apparatus

Portable shell usable as an acoustical or visual enclosure...