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- Thread starter introuble
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- #1

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- #2

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[tex]G_{\mathrm{dB}}=20\log V[/tex]

Where [tex]G_{\mathrm{dB}}[/tex] is the value in decibels and V is the voltage measured in volts.

Thats log base 10 by the way :tongue:

- #3

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[tex]G_{\mathrm{dB}}=20\log V[/tex]

Where [tex]G_{\mathrm{dB}}[/tex] is the value in decibels and V is the voltage measured in volts.

Thats log base 10 by the way :tongue:

How would i use this? i am really confused atm lol

does it depend on the speaker size or not.

- #4

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What are you trying to measure?

My understanding is that you are playing a pure tone from a signal generator into a speaker. Then what?

I thought that the 0v to 12v was a voltage out across the speaker terminals that you wanted to convert to decibels.

- #5

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A db to watt per speaker might be better.

- #6

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Ok, start slowly.

What are you trying to measure?

My understanding is that you are playing a pure tone from a signal generator into a speaker. Then what?

then by a decibel reader i read the decibels from the speaker and and turn the voltage up and record the decibels again.

- #7

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Ok, so the decibels are from the sound and you want to find out the amplitude of the sound as a function of the amplitude of the voltage put into the speaker.

Is that right?

If it is:

[tex]A=10^{\frac{G_{dB}}{20}}[/tex] will give you the amplitude of the sound. The amplitude of the voltage is a known quantity then since you are putting that into your speaker.

Is that right?

If it is:

[tex]A=10^{\frac{G_{dB}}{20}}[/tex] will give you the amplitude of the sound. The amplitude of the voltage is a known quantity then since you are putting that into your speaker.

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