| tech. |
conversion transducer; converter unit; frequency changer; converter; frequency rectifier; frequency translator; frequency-changing circuit; frequency converter (A frequency changer or frequency converter is an electronic device that converts alternating current (AC) of one frequency to alternating current of another frequency. The device may also change the voltage, but if it does, that is incidental to its principal purpose. wiki Alexander Demidov); frequency transducer (A frequency transducer is a mechanism for converting a type of energy, usually electrical or electromagnetic, into sound. It can also act in the reverse, converting sound into other forms of energy. Frequency transducers have a wide range of uses, from sonar equipment to acoustic speakers, microphones, and guitar pick-ups. They are also utilized in medical ultrasonic imaging, as well as ultrasonic sterilization.  wisegeek.com Alexander Demidov) |
