| Signal To Noise Ratio [message #93750] |
Wed, 12 May 2021 21:08  |
Concorde
Messages: 149
Registered: December 2013
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Master |
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I'm trying to better understand SRN and its relation to decibels. The main thing I'm stuck on is how there can be more signal than noise, and how does that effect the decibal level. Wikipedia didn't explain it that well.
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| Re: Signal To Noise Ratio [message #93761 is a reply to message #93750] |
Thu, 13 May 2021 09:25  |
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Wayne Parham
Messages: 18793
Registered: January 2001
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Illuminati (33rd Degree) |
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The "signal" is the content that you want and the noise is everything else, like static, hiss, hum, etc.
If the noise were 10,000 times lower than the signal, it would be 40dB lower.
That "10,000 times less powerful" is really just how decibels work: 10dB is 10x, 20dB is 100x, 30dB if 1000x and so on.
So the SNR is expressed in decibels, and it's really just how many decibels less noise is in comparison with the desired content signal.
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| Re: Signal To Noise Ratio [message #93762 is a reply to message #93750] |
Thu, 13 May 2021 18:48 |
Silver
Messages: 116
Registered: December 2013
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Viscount |
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So a decibel is produced by the diffence? I just thought it was the loudness dictated by the volume knob.
Is this how they determined that The Who concert back in the day was the loudest ever recorded?
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