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November 01, 2025, 08:46:48 am
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Author Topic: Sound Level/Intensity Problem  (Read 885 times)  Share 

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naved_s9994

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Sound Level/Intensity Problem
« on: September 07, 2009, 07:41:33 pm »
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20 Students altogether were speaking at an intensity level measured to be 81dB. If all but five stopped talking, what
would the new intensity level be?
How would you do this? :o
« Last Edit: September 07, 2009, 07:49:00 pm by naved_s9994 »
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appianway

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Re: Sound Level/Intensity Problem
« Reply #1 on: September 07, 2009, 07:53:24 pm »
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OK, I can't be bothered doing the calculations, but I presume you do it like this.

Find the sound intensity of 81 dB (using 81 = 10log(x/10^-12)). Divide this by 4 (because 5/20 is 1/4). Convert this level into dB using the formula sound intensity level = 10log(y/10^-12).
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naved_s9994

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Re: Sound Level/Intensity Problem
« Reply #2 on: September 07, 2009, 08:02:00 pm »
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Thats got me the correct Answer. Thankyou !
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