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The Loudspeaker Output Transducer Sound can also be used as an output device to produce an alert noise or act as an alarm, and loudspeakers, buzzers, horns and sounders are all types of sound transducer that can be used for this purpose with the most commonly used audible type output sound actuator being the “Loudspeaker“.
The Audio Sound Transducer Audio Sound Transducers include both input sensors, that convert sound into and electrical signal such as a Microphone, and output actuators that convert the electrical signals back into sound such as a loudspeaker.
We tend to think of sound as only existing in the range of frequencies detectable by the human ear, from 20Hz up to 20kHz (a typical loudspeaker frequency response), but sound can also extend way beyond these ranges.
A tweeter is a special type of loudspeaker (usually dome or horn-type) that is designed to produce high audio frequencies, typically from around 2,000 Hz to 20,000 Hz (generally considered to be the upper limit of human hearing). Specialty tweeters can deliver high frequencies up to 100 kHz. The name is derived from the high pitched sounds made by some birds, especially in contrast to the low woofs made by many dogs, after which low-frequency drivers are named (woofers
Cone tweeters have the same basic design and form as a woofer with optimizations to operate at higher frequencies. The optimizations usually are:
a very small and light cone so it can move rapidly;
cone materials chosen for stiffness (e.g., ceramic cones in one manufacturer's line), or good damping properties (e.g., paper, silk or coated fabric) or both; a suspension (or spider) that is stiffer than for other drivers—less flexibility is needed for high frequency reproduction;
small voice coils (3/4 inch is typical) and light (thin) wire, which also helps the tweeter cone move rapidly
Types of tweeters
Cone tweeter
Dome tweeter
Piezo tweeter
Ribbon tweeter
Planar-magnetic tweeter
Electrostatic tweeter
AMT tweeter
Horn tweeter
Plasma or Ion tweeter