(a) Determine the energy density and effective pressure amplitude of a plane wave in air of intensity level 70DB re 102 W/m. (b) Determine the energy density and effective pressure amplitude of a plane wave in water if its sound pressure level is 70DB re 1 ubar. (a) Show that at constant P. the characteristio

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O 74dB re 10
W/m". (b) Find the intensity (W/m“) produced by an acoustic plane wave in
water of SPL(1 µbar) = 120DB. (c) What is the ratio of the acoustic pressure in water for a plane wave
to that of a similar wave in air of equal intensity?
5.12.6. (a) Determine the energy density and effective pressure amplitude of a plane wave in air of intensity
12
level 70DB re 10 W/m. (b) Determine the energy density and effective pressure amplitude of a plane
wave in water if its sound pressure level is 70DB re 1 ubar.
5.12.7. (a) Show that at constant P the characteristic impedance of a gas is inversely proportional to the
square ront of its abcoluto tom
Transcribed Image Text:O 74dB re 10 W/m". (b) Find the intensity (W/m“) produced by an acoustic plane wave in water of SPL(1 µbar) = 120DB. (c) What is the ratio of the acoustic pressure in water for a plane wave to that of a similar wave in air of equal intensity? 5.12.6. (a) Determine the energy density and effective pressure amplitude of a plane wave in air of intensity 12 level 70DB re 10 W/m. (b) Determine the energy density and effective pressure amplitude of a plane wave in water if its sound pressure level is 70DB re 1 ubar. 5.12.7. (a) Show that at constant P the characteristic impedance of a gas is inversely proportional to the square ront of its abcoluto tom
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