sound surface wave oscillator

sound surface wave band pass filter

sound surface wave band rejection filter

sound surface wave convolution device

sound surface wave filter

sound surface wave frequency-modulated oscillator

sound surface wave multichannel filter assembly

sound surface wave resonator

sound surface wave thin coating

sound surface wave transmitter

sound surface wave vestigial side-band filter

surface wave oscillator

A weighted sound pressure level

active sound control

Application of Sound Wave Soot Flower of Boiler

Arithmetical average sound pressure

attenuation of sound wave

automatic regulation of sound pressure level

average sound pressure level