Active sonar and acoustic communication systems rely on electroacoustic transducers which "project" sound that is subsequently detected by hydrophones through a direct path or reflection from a target ...

The crystal in a crystal earpiece is a piezoelectric sound transducer. Back in the 1960s, these were fairly common in cheap transistor radios and hearing aids. Their sound fidelity isn’t very ...

Sound Level Meter Unit for measuring sound pressure level (SPL) and different weightings such as A-weighted SPL, C-weighted SPL, sound exposure level, etc. Noise Dosimeter Specific measurement ...

A special ultra-sound system with 256 individually controllable transducers makes it possible to target and stimulate individual points deep inside the brain with sound signals. In the future ...