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2. Electric bell - Wikipedia

   en.wikipedia.org/wiki/Electric_bell

   An electric buzzer uses a similar mechanism to an interrupter bell, but without the resonant bell. They are quieter than bells, but adequate for a warning tone over a small distance, such as across a desktop. A buzzer or beeper is an audio signalling device, which may be mechanical, electromechanical, or piezoelectric.

3. Buzzer - Wikipedia

   en.wikipedia.org/wiki/Buzzer

   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.

4. Electromagnetically induced acoustic noise - Wikipedia

   en.wikipedia.org/wiki/Electromagnetically...

   reducing the resonances occurring between electromagnetic excitations and structural modes; Electromagnetic noise and vibration mitigation techniques in electrical machines include: choosing the right slot/pole combination and winding design; avoiding resonances match between stator and electromagnetic excitations; skewing the stator or the rotor

5. Piezoelectric speaker - Wikipedia

   en.wikipedia.org/wiki/Piezoelectric_speaker

   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 ...

6. Electronic component - Wikipedia

   en.wikipedia.org/wiki/Electronic_component

   Bolometer – Device for measuring the power of incident electromagnetic radiation; Thermal cutoff – Switch that is opened or closed when a set temperature is exceeded; Magnetic field (see also Hall Effect in semiconductors) Magnetometer, Gauss meter; Humidity Hygrometer; Electromagnetic, light Photo resistor – Light dependent resistor (LDR)

7. Ringing (telephony) - Wikipedia

   en.wikipedia.org/wiki/Ringing_(telephony)

   A ring generator or ringing voltage generator is a device which outputs 20 cycle sinusoidal AC at up to 110 volts peak to power bells or annunciators in one or more telephone extensions. [4] The output stops if a handset is taken off the hook. In terminology devised by phone phreaks, a ringing generator is a magenta box.

8. Vibration-powered generator - Wikipedia

   en.wikipedia.org/wiki/Vibration-powered_generator

   The ability to make piezoelectric generators on such a small scale is the main advantage of this method over the electromagnetic generators, especially when the generator is being developed to power microelectronic devices. Piezoelectric vibration generator has been commercialized.

9. Vibrator (mechanical) - Wikipedia

   en.wikipedia.org/wiki/Vibrator_(mechanical)

   Many older, non-electronic buzzers and doorbells contain a component that vibrates for the purpose of producing a sound. Tattoo machines and some types of electric engraving tools contain a mechanism that vibrates a needle or cutting tool.