Patient controlled master hearing aid
Peak-limiting apparatus for audio signal
Percussion air motor
Percussion apparatus for piezo-electric device
Perimeter mounted polymeric piezoelectric transducer pad
Peripherally reinforced laminated loudspeaker diaphragm
Peritympanic hearing instrument
Permanent magnet biased magnetostrictive transducer
Permanent magnet transducer
Personal audio listening system
Personal computing devices comprising a resonant panel...
Personal hearing evaluator
Personal interpreter
Personal portable integrator for music player and mobile phone
Personal portable integrator for music player and mobile phone
Personal sound masking system
Personal wearable communication and speaker system
Phase plug and acoustic lens for direct radiating loudspeaker
Phase shift low frequency loudspeaker system
Phonograph pick-up with plurality of piezoelectric elements