if concorde registers at 128dB and another aeroplane registers at 94 dBwhat is their combined loudness?...

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- June 14th 2007, 05:14 AM #1

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- June 14th 2007, 05:29 AM #2
The long way first:

(where is the reference level, the value of which at the moment escapes me, but we don't need a value for it anyway.)

For the second sound

etc.

So

So the "loudness" will be:

I have corrected the above calculation (thanks again to CaptainBlack). The result is still practically the same as my original result in that it would be VERY difficult to hear the 94 dB sound as it barely contributes compared to the 128 dB sound.

-Dan

- June 14th 2007, 09:12 AM #3

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- June 14th 2007, 09:55 AM #4

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- June 15th 2007, 05:08 AM #5

- June 15th 2007, 05:25 AM #6

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- June 18th 2007, 05:34 AM #7

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## ok.....

ok i sort of got that..bt disreguarding the fact if u can or cannot hear certain things.....what actualy is the combined loudness if u did add both sounds together....

the sounds being...

concorde registering 120dB

and

an aeroplane registering 94dB?

- June 18th 2007, 06:53 AM #8