dB FS Calculator

[Sauerkrautonaut]

Please add a dB FS to Amplitude calculator to the calculator section. I think it would be useful. I find myself needing one all the time. Thanks

 

[voodooless]

Amplitude of what?

 

[SSS]

dB FS is relative. There is no direct connection to a specific amplitude. You need to define the amplitude of 0 dB FS which can be very different according to the specific ADC or DAC.

 

[Redacted]

My guess is that 0dB might be full-scale!

 

[Sauerkrautonaut]

Amplitude here just means the linear signal level as a fraction of full scale (0 to 1), which is the standard convention as per the definition of dBFS (please spend ten seconds on Wikipedia for further information, or go to https://ccrma.stanford.edu/~jos/intro/DB_Full_Scale_dBFS.html if you're feeling ambitious). The conversion is simple:

dBFS = 20 * log10(amplitude)

So an amplitude of 0.5 = 20 * log10(0.5) ≈ -6.0206 dB FS

and the inverse is a similarly simple formula:

amplitude = 10^(dBFS/20)

But this is cumbersome to calculate in a non-scientific calculator, and I don't always have a scientific one on hand.

Hope this helps.

 

[staticV3]

If you know the full-scale amplitude, then you can calculate the resulting amplitude from a given dBFS signal as A*10^(dBFS/20).

So for example, 2Vrms full scale at -10dBFS signal level will result in 2*10^(-10/20)=0.63Vrms

 

[voodooless]

Decibel (dB) converter

 

[SSS]

Please look here:

dB dBu dBFS dBV to volts audio conversion digital - calculator volt to dBu and dBV dB mW SPL dB decibels 0 dBFS - convert dB volt normal decibels relatioship relation explanation analog audio absolute level true rms convertor converter decibel to dbf

dB dBu dBFS digital audio conversion dBV from dBu to volt, dBV to volt, volt to dBu and dBV dB decibels calculation SPL 0 dBFS normal decibels relationship relation explanation analog audio absolute level true rms convertor converter decibel to dbfs converter attenuation ratio reference convert...

sengpielaudio.com

 

[Speedskater]

Where might the "calculator section" be located ?

 

[audio_tony]

Where might the "calculator section" be located ?

I didn't know either but the search helped...

Audio Calculators

www.audiosciencereview.com

 

[voodooless]

I didn't know either but the search helped...

Audio Calculators

www.audiosciencereview.com

You can just use the middle one and shift the decimal point a bit