An airborne plane sound wave of frequency 1881 Hz is incident at an angle 45° on the calm surface of a freshwater lake. Assume the tempera- ture is 20°C for the water and the air. The sound pressure level (SPL) of the incident sound wave is 100 dB (re 20µPa). What is the SPL of the sound in the water (re 1µPa) 0.1 m below the surface?
An airborne plane sound wave of frequency 1881 Hz is incident at an angle 45° on the calm surface of a freshwater lake. Assume the tempera- ture is 20°C for the water and the air. The sound pressure level (SPL) of the incident sound wave is 100 dB (re 20µPa). What is the SPL of the sound in the water (re 1µPa) 0.1 m below the surface?
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Transcribed Image Text:5-7. An airborne plane sound wave of frequency 1881 Hz is incident at an'
angle 45° on the calm surface of a freshwater lake. Assume the tempera-
ture is 20°C for the water and the air. The sound pressure level (SPL) of
the incident sound wave is 100 dB (re 20µPa). What is the SPL of the
sound in the water (re 1µPa) 0.1 m below the surface?
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