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A piezoelectric speaker (also known as a piezo bender due to its mode of operation, and sometimes colloquially called a "piezo", buzzer, crystal loudspeaker or beep speaker) is a loudspeaker that uses the piezoelectric effect for generating sound. The initial mechanical motion is created by applying a voltage to a piezoelectric material, and ...
A tweeter or treble speaker is a special type of loudspeaker (usually dome, inverse dome or horn-type) that is designed to produce high audio frequencies, typically up to 100 kHz. The name is derived from the high pitched sounds made by some birds (tweets), especially in contrast to the low woofs made by many dogs , after which low-frequency ...
Retrieved from "https://en.wikipedia.org/w/index.php?title=Piezoelectric_speakers&oldid=677782584"This page was last edited on 25 August 2015, at 13:48
The use of thin film piezoelectric materials in electronics began in the early 1960s at Bell Telephone Laboratories/Bell Labs. Earlier piezoelectric crystals were developed and used as resonators in applications like oscillators with frequencies up to 100 MHz. Thinning was applied for increasing the resonance frequency of the crystals.
Animal Jam Classic, [1] formerly known as Animal Jam, is a massively multiplayer online game developed by WildWorks and recommended for kids up to the age of 12. It was launched in 2010, in collaboration with the National Geographic Society . [ 2 ]
A crystal earpiece typically consists of a piezoelectric crystal with metal electrodes attached to either side, glued to a conical plastic or metal foil diaphragm, enclosed in a plastic case. The piezoelectric material used in early crystal earphones was Rochelle salt , but modern earphones use barium titanate , or less often quartz .
Maggie was born and hand-raised at the Bowmanville Zoo in Bowmanville, Ontario, Canada. [1] At the zoo, she was trained to spin a wheel. In 2003, several executives and expert panelists from the Canadian sports broadcaster TSN decided they would "do something random" with their show, and they ended up bringing Maggie onto their broadcasts to make predictions. [2]
Football tournament FIFA World Cup final Founded 1930 ; 94 years ago (1930) Current champions Argentina (3rd title) Most successful team(s) Brazil (5 titles) The FIFA World Cup is an international association football competition contested by the senior men's national teams of the Fédération Internationale de Football Association (FIFA), the sport's global governing body. The championship ...