Parametric Array
Parametric arrays. Arrays of sources (or receivers) of sound formed by variation of appropriate parameters of the propagation medium. Normally, these parameters are the local sound speed and the particle velocity which vary because of the presence of large-amplitude pump, or primary, sound waves. An experimental investigation of the parametric array in air was conducted using a circular piston transducer which produced spherically spreading, collinear, primary. In the field of acoustics, a parametric array is a nonlinear transduction mechanism that generates narrow, nearly side lobe-free beams of low frequency sound, through.
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