Enhanced sound transmission from water to air at low frequencies.
Excitation of acoustic radiation into the air from a low-frequency point source under water is investigated using plane wave expansion of the source spectrum and Rayleigh reflection/transmission coefficients. Expressions are derived for the acoustic power radiated into air and water as a function of source depth and given to lowest order in the air/water density ratio. Near zero source depth, the radiation into the water is quenched by the source's acoustic image, while the power radiated into air reaches about 1% of the power that would be radiated into unbounded water.
McDonald
B Edward
BE
Naval Research Laboratory, Washington, DC 20375, USA. mcdonald@sonar.nrl.navy.mil
Calvo
David C
DC
D000388:Air; D005583:Fourier Analysis; D008962:Models, Theoretical; D009038:Motion; D011312:Pressure; D013016:Sound; D014867:Water
D014867:Water