Piezoelectric Speakers

Piezoelectric Speakers :-Piezoelectric speakers are limited in frequency response therefore they are only used as tweeters or in small electrical devices like watches/clocks to make simple sounds. Piezoelectronics are a solid state technology which makes them durable and good for use as a microphone underwater. These speakers are used as microphones in submarine warfare, they can detect other microphones and hear sounds of other vessels.