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    jgiffor86's Avatar
    jgiffor86 Posts: 5, Reputation: 1
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    #1

    Mar 23, 2009, 12:30 PM
    pre calculus intensity and inverses
    The noise level, N, of a sound in decibels is given by
    N=f(I)= 10log(I/I0) <---the 0 in the (I/I0) is a sub 0

    where I is the intensity of the sound and I0 (sub 0) is a constant.
    Find and interpret f-1(N) the inverse

    I don't know how to even go about doing this??
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
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    #2

    Mar 23, 2009, 12:47 PM

    You have an equation like this:



    so they want you to work this so that you get I all by itself. The only trick here is to use the fact that if

    then
    jgiffor86's Avatar
    jgiffor86 Posts: 5, Reputation: 1
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    #3

    Mar 23, 2009, 01:08 PM
    So would the I/I0 become just and I?
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    ebaines Posts: 12,131, Reputation: 1307
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    #4

    Mar 23, 2009, 01:56 PM

    I don't follow you. In the equation I gave you c = (I/Io)
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