   Chapter 14, Problem 17P

Chapter
Section
Textbook Problem

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 creature has been measured as high as 100. dB. (a) Calculate the intensity of the sound wave emitted. (b) What is the intensity level if three of these toadfish try to make a sound at the same time?

(a)

To determine
The intensity of sound wave emitted.

Explanation

Given Info: Intensity level of toad fish is 100 dB.

Formula for intensity level of this creature

β=10log(II0)

• I is the intensity of a toadfish
• I0 is the intensity constant

Rearrange the expression in terms of I

10β10=(II0)I=10β10I0

The value for reference intensity of a sound is 1.0×1012W/m2 .

Substitute 100 dB for β1 and 1

(b)

To determine
The intensity level if three of these toadfish try to make a sound at the same time

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