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Sound Intensity and Decibels

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When four quadruplets cry simultaneously, how many decibels greater is the sound intensity level than when a single one cries?

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Solution Summary

The expert examines the sound intensity and decibels. The four quadruplets cry simultaneously decibels are determined.

See Also This Related BrainMass Solution

Sound intensity, Speed of waves on the string

1. The intensity of sound 20 meters from a race car is 0.0100 W/m^2.
(A) What is the sound intensity level in dB?
(B) What would the intensity (in W/m^2) be at a distance 80 m from the car? Find the corresponding intensity level in dB.

2. Suppose a violin player touches the "A" string 1/3 of the distance from the end, which produces a harmonic as shown. The length of an "A" string is 45 cm, and its fundamental frequency is 440 Hz.
(A) Find the frequency heard.
(B) Find the speed of waves on the string.

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