Tweeter (from the English. Tweeter , Russian-speaking sound technicians, designers and musicians often use the word "squeaker") - a loudspeaker designed to reproduce the high-frequency part of the sound range (for example, 2-20 kHz), as a rule, as part of a multi-band speaker system .
Constructive requirements for such loudspeakers include conflicting requirements for the combination of lightness and rigidity of the diffuser with its mobility:
- The minimum mass of the moving part of the radiator (lightness) and the flexibility of the suspension.
- Emitter stiffness (ability to resist bending deformations when transforming mechanical vibrations into acoustic waves ).
- High induction in the magnetic gap (provides maximum efficiency ).
Such emitters, according to the types of conversion of electrical energy into acoustic energy, are of different types:
- Electrodynamic , the most common type;
- Isodynamic (including Hale emitters );
- Orthodynamic.
- Electrostatic .
- Piezo emitters (typically - transmit impulse, emphasize the front of the sound wave at the time of the attack of percussion instruments ).
Emitter material (diffuser can be silk (impregnated), film based on various plastics , metallic ( aluminum , titanium , beryllium ; from Focal acoustics, Monitor Audio), paper (outdated types).
The shape of the diffuser are dome , conical, concave dome (Focal), tape (isodynamic, electrostatic), other types.
In a number of loudspeaker designs, the supertiter is also released in a separate band in addition to the tweeter - a high-frequency loudspeaker of the uppermost part of the sound range, which is also capable of providing work in the lower part of the ultrasonic range (its minor property).