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    Red Dragon's Avatar
    Red Dragon is offline Junior Member

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    Spartanburg, SC
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    Testing signal to noise ratio

    I was wondering if there was a meter you can buy or a way to test the signal to noise ratio of my car audio system.

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    calebkhill's Avatar
    calebkhill is offline Elite

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    Re: Testing signal to noise ratio

    Look at your amp specs.
    Play a digital silence track, turn up volume, is there sound of any sort? (this is one way right?)

    "When I listen to a stereo loudspeaker playback in my room and an auditory scene has formed in my mind, how would I know that what I hear is an accurate replica of an auditory scene that could be had at the recording venue? Or more generally, that this is an auditory scene that could have existed at all?"

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    maylar's Avatar
    maylar is offline Electrical Weenie

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    Re: Testing signal to noise ratio

    You would need a wide bandwidth audio voltmeter that goes to very low input levels, like an HP FL-400. You measure output at full power then measure the noise voltage with no signal and calculate the ratio as dB.

    Realize though that 80dB SNR is 10000:1 so if the output is 10 volts the noise would be .001 volt.

    1999 Buick Park Ave Ultra
    Head Unit: JVC KWHDR720
    EQ: Audiocontrol EQL
    Front Stage: Hybrid Audio Technologies Imagine 5.25 mids, Morel Maximo tweets
    Sub Stage: Boston G3 10", 0.5 cu ft sealed
    Amp: PPI Phantom 900.4
    Rear Fill: Boston SE953 6X9's

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