Stefan Kiessling – organist
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Noise Calculations

Noise Calculations

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This calculator focuses on the noise that appears in the audio signal chain. The various noises sum up to a resulting noise in the final audio. Depending on the situation some noises have almost no influence on the result. For instance in most cases the preamp noise does not increase the noise sum, as the room noise and microphone noise is much higher.
All dB values should refer to the A-weighted value.

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Show explanation of Pa, V, dB, dBu, dBV, dB FS…


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Sound Source

Min and max sound pressure level emitted by this sound source, measured at a distance of  m. Sound pressure level emitted by this sound source
min: dB SPL  max: dB SPL
Distance to sound:
Room noise:
Sound too loud for the microphone.
Increase the distance.
Pattern / Angle / Distance fact.:
Sensitivity: mV/Pa
Impedance: Ω
Eqv. Noise: dB SPL
max. SPL: dB SPL
Preset :
Attenuator (PAD)
Input signal too high.
Please lower the preamp gain or increase the mic distance or engage a pad to the mic.
max. Input:
Noise (EIN):
Preset :
Signal is clipping.
Please lower the preamp gain.
Reference Level:
max dB FS:
Dynamic Range:
Preset :
Noise reduction
Signal is clipping.
Please lower the fader.
Dynamic Range: dB
Reference Level @0dBFS: dBu
Preset :
Active Monitor
Input gain control: dBu
Input level for 100 dB SPL output in 1 m distance: dBu
Noise in 1 m distance: dB SPL
Analogue volume control
Preset :
Distance to ear:
Noise in the
listening room:
Measures after Noise reduction, as a function of the preamp gain.
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