What is the Sound Pressure level in dB of a measured pressure level of 4x10~5Nm per second?

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(Pressure reference level = 2 x 10~5 Nm per second)
the formula is spl= 20log(measured/ref)

(A) 12 dB?
(B) 6 dB?
(C) 3 dB?
(D) 60 dB?

2006-10-31 22:47:06 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Physics

P/Po = 4x10-5/2x10-5 = 2

Next we take the log of this value

log(2) =0.3010

and multiply by 20 to get Lp

Lp=20 x 0.3010 = 6 dB.

2006-10-31 23:39:24 · answer #1 · answered by JJ 7 · 0⤊ 0⤋

Does this relate to my question on the 85dB rating sticker on my wheely-bin?

2006-11-01 06:52:56 · answer #2 · answered by Ask the chicken 2 · 0⤊ 0⤋