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- Q1407964 subject Q6960222.
- Q1407964 subject Q7060996.
- Q1407964 subject Q7149712.
- Q1407964 abstract "A Piezoelectric speaker or buzzer 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 this motion is typically converted into audible sound using diaphragms and resonators. Compared to other speaker designs piezoelectric speakers are relatively easy to drive; for example they can be connected directly to TTL outputs, although more complex drivers can give greater sound intensity. Typically they operate well in the range of 1-5kHz and up to 100kHz in ultrasound applications. Piezoelectric speakers are frequently used as beepers in watches and other electronic devices, and are sometimes used as tweeters in less-expensive speaker systems, such as computer speakers and portable radios. They are also used for producing ultrasound in sonar systems. Piezoelectric speakers have several advantages over conventional loudspeakers: they are resistant to overloads that would normally destroy most high frequency drivers, and they can be used without a crossover due to their electrical properties. There are also disadvantages: some amplifiers can oscillate when driving capacitive loads like most piezoelectrics, which results in distortion or damage to the amplifier. Additionally, their frequency response, in most cases, is inferior to that of other technologies, especially with regards to bass and midrange. This is why they are generally used in applications where volume and high pitch are more important than sound quality.Piezoelectric speakers can have extended high frequency output, and this is useful in some specialized circumstances; for instance, sonar applications in which piezoelectric variants are used as both output devices (generating underwater sound) and as input devices (acting as the sensing components of underwater microphones). They have advantages in these applications, not the least of which is simple and solid state construction that resists seawater better than a ribbon or cone based device would.In 2013, Kyocera introduced piezoelectric ultra-thin medium-size film speakers with only 1 milimeter of thickness and 7 grams of weight for their 55" OLED televisions and they hope the speakers will also be used in PCs and tablets. Besides medium-size, there are also large and small sizes which can all produce relatively the same quality of sound and volume within 180 degrees. The highly responsive speaker material provides better clarity than traditional TV speakers.".
- Q1407964 thumbnail 2007-07-24_Piezoelectric_buzzer.jpg?width=300.
- Q1407964 wikiPageWikiLink Q11461.
- Q1407964 wikiPageWikiLink Q133220.
- Q1407964 wikiPageWikiLink Q162564.
- Q1407964 wikiPageWikiLink Q178794.
- Q1407964 wikiPageWikiLink Q183759.
- Q1407964 wikiPageWikiLink Q209593.
- Q1407964 wikiPageWikiLink Q570.
- Q1407964 wikiPageWikiLink Q6960222.
- Q1407964 wikiPageWikiLink Q7060996.
- Q1407964 wikiPageWikiLink Q7149712.
- Q1407964 wikiPageWikiLink Q745099.
- Q1407964 comment "A Piezoelectric speaker or buzzer 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 this motion is typically converted into audible sound using diaphragms and resonators.".
- Q1407964 label "Piezoelectric speaker".
- Q1407964 depiction 2007-07-24_Piezoelectric_buzzer.jpg.