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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 buzzer or beeper is an audio signaling device, [1] which may be mechanical, electromechanical, or piezoelectric (piezo for short). Typical uses of buzzers and beepers include alarm devices , timers , train and confirmation of user input such as a mouse click or keystroke.
A Buzz! buzzer. The Buzz! Buzzer is a special controller designed specifically for the Buzz! game series. The controller handset has a large red buzzer button and four smaller coloured buttons for selecting the answer from the on-screen options. The buzzer set is a USB device, and connects to the USB ports on the PlayStation 2 and PlayStation 3 ...
The "Wave Radio II" was introduced in 2005 and was based on the Wave Music System without the CD player. It used a dual tapered waveguide and revised speakers. The "Wave Radio III", introduced in 2007, was identical in appearance to the Wave Radio II and added Radio Data System (RDS) and a large snooze button on top of the unit.
The Mosquito or Mosquito alarm is a machine used to deter loitering by emitting sound at high frequency. In some versions, it is intentionally tuned to be heard primarily by younger people. Nicknamed "Mosquito" for the buzzing sound it plays, the device is marketed as a safety and security tool for preventing youths from congregating in ...
Buzzer is a special controller designed specifically for the Buzz! quiz game series. The controller features a large red buzzer button and four smaller coloured buttons for answer selection. Both wired and wireless versions are available and come bundled with Buzz! games. A four-buzzer set acts as a single USB device and connects a USB port on ...
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The Sony CLIÉ PEG-SJ22 was a Palm OS based handheld "Personal Entertainment Organizer" released by Sony in 2003, it is a very similar device to the Sony CLIÉ PEG-SJ30 with a slightly different software package.