Passive acoustic radiating

Passive headphone equalizing

Passive radiator cooled electronics/heat sink housing for a...

Passive radiator having mass elements

Passive vibroacoustic attenuator for structural acoustic...

Performance enhancement of closed-ended magnetic circuits by sel

Permanent magnet actuator with electric excitation coil,...

Permanent magnet system with associated coil arrangement

Personal audio system and earphone for same

Personal audio-set with adjustable sliding ear clip mount

Personal audio-set with pivoting ear clip mount

Personal communications earpiece

Personal communications earpiece

Personal earphone assembly for mounting upon eyeglasses

Personal earphone assembly for mounting upon eyeglasses

Personal sound system

Personal speakers with connection source and target

Phase plug with optimum aperture shapes

Phasing plug

Phasing plug for a compression driver