Helmet with built-in speaker system and speaker system for...
High displacement solid state ferroelectric loudspeaker
Loudspeaker
Loudspeaker
Loudspeaker using an electro-active device
Micromachined piezoelectric microspeaker and fabricating...
Multi-segmented high deformation piezoelectric array
Multi-segmented high deformation piezoelectric array
Piezo speaker and installation method for laptop personal comput
Piezo speaker for improved passenger cabin audio system
Piezo-electric speaker
Piezo-electric speaker
Piezo-electric speaker
Piezoceramic capsule for telephone instruments
Piezoelectric acoustic device
Piezoelectric acoustic device
Piezoelectric acoustic element, acoustic device, and...
Piezoelectric acoustic transducer
Piezoelectric and foam resin sheet speaker
Piezoelectric diaphragm and piezoelectric speaker