Uaser
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The term uaser is the term coined for an ultrasonic laser. Like its quantum mechanical counterparts, lasers and masers, the acronym uaser (pronouned way-zer) stands for ultrasound amplification by stimulated emission of radiation.
Sound is a classical system (see continuum mechanics), and so the coherent structure in the case of the uaser is coherent in the sense of distributions[disambiguation needed]. The technique, which is still in its infancy, is accomplished by synchronizing the frequency of piezoelectric transducers. The stimulated emission in the case of the uaser is a power law amplification in the output signal of the acoustic beam.
