Piezo tweeter12/21/2023 ![]() Some tweeters sit outside the main enclosure in their own semi-independent unit. Tweeters can also work in collaboration with the woofers that are responsible for generating the low frequencies or bass. Among the challenges in tweeter design and manufacture are: providing adequate damping, to stop the dome's motion rapidly when the signal ends ensuring suspension linearity, allowing high output at the low end of its frequency range ensuring freedom from contact with the magnet assembly, keeping the dome centered as it moves and providing adequate power handling without adding excessive mass. Tweeters are intended to convert an electrical signal into mechanical air movement with nothing added or subtracted, but the process is imperfect, and real-world tweeters involve tradeoffs. Hard dome tweeters are usually made of aluminium, aluminium-magnesium alloys, or titanium. Many soft dome tweeter diaphragms are thermoformed from polyester film, or silk or polyester fabric that has been impregnated with a polymer resin. As tweeter technology has advanced, different design applications have become popular. Modern tweeters are typically different from older tweeters, which were usually small versions of woofers. Since the coil is attached to a diaphragm, the vibratory motion of the voice coil transmits to the diaphragm the diaphragm in turn vibrates the air, thus creating air motions or audio waves, which is heard as high sounds. This mechanical movement resembles the waveform of the electronic signal supplied from the amplifier's output to the voice coil. The voice coil produces a varying magnetic field, which works against the fixed magnetic field of a permanent magnet around which the cylindrical voice coil is suspended, forcing the voice coil and the diaphragm attached to it to move. These designs operate by applying current from the output of an amplifier circuit to a coil of wire called a voice coil. Nearly all tweeters are electrodynamic drivers using a voice coil suspended within a fixed magnetic field.
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