You are standing in the middle of a large room listening to a cacaphony of sound

ID: 1364424 • Letter: Y

Question

You are standing in the middle of a large room listening to a cacaphony of sounds. Rank the intensity of the sounds from each source (1=loudest, 2= next loudest, ...) Consider all objects to be right next to you. If two values are within 0.1 dB from each other, consider them to be the same.
12345 Two buzzers each producing a sound with intensity level of 90 dB.
12345 An object emitting a sound with an intensity level of 110 dB.
12345 An object emitting a sound with an intensity of 1.0×10-9 W/m2.
12345 100 buzzers each producing a sound with intensity level of 70 dB.
12345 An object emitting a sound with an intensity level of 100 dB. You are standing in the middle of a large room listening to a cacaphony of sounds. Rank the intensity of the sounds from each source (1=loudest, 2= next loudest, ...) Consider all objects to be right next to you. If two values are within 0.1 dB from each other, consider them to be the same.
12345 Two buzzers each producing a sound with intensity level of 90 dB.
12345 An object emitting a sound with an intensity level of 110 dB.
12345 An object emitting a sound with an intensity of 1.0×10-9 W/m2.
12345 100 buzzers each producing a sound with intensity level of 70 dB.
12345 An object emitting a sound with an intensity level of 100 dB.

Explanation / Answer

a ) 2 * 90 dB = 90 + 10log2 = 93.01 db ................(3)

b ) 110 dB ............(1)

c) 30 dB ..............(5)

d) 100* 70 = 70 + 10 log 100 = 90 dB ..........(4)

e ) 100 dB .............(2)

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You are standing in the middle of a large room listening to a cacaphony of sound

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You are standing in the middle of a large room listening to a cacaphony of sound

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