Unformatted text preview: ⎟ ⎟ ⎠ ⎞ ⎜ ⎜ ⎝ ⎛ 1 p p from dB IL = 10 log ⎟ ⎟ ⎠ ⎞ ⎜ ⎜ ⎝ ⎛ 1 I I . Hint: Use the relation p 2 ∞ I . Start with the equation for dB IL, and substitute I by p 2 . So the first step would be dB SPL = 10 log ( ) ( ) ⎟ ⎟ ⎠ ⎞ ⎜ ⎜ ⎝ ⎛ 2 2 1 p p . This is the same as 10 log 2 1 ⎟ ⎟ ⎠ ⎞ ⎜ ⎜ ⎝ ⎛ p p , which is the same as 10 x 2 log ⎟ ⎟ ⎠ ⎞ ⎜ ⎜ ⎝ ⎛ 1 p p , which is 20 log ⎟ ⎟ ⎠ ⎞ ⎜ ⎜ ⎝ ⎛ 1 p p...
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 Fall '08
 Gerhardt
 Englishlanguage films, Harshad number, dB SPL, Irradiance

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