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The toadfish makes use of resonance in a closed tube to produce very loud sounds. The tube is its swim bladder, used as an amplifier, the sound level of this
reature has been measured as high as 75 dB.
(a) Calculate the intensity of the sound wave emitted.
W/m²
(b) What is the intensity level if three of these fish try to imitate three frogs by saying "Budweiser" at the same time?
dB

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