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
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