Microphone SPL
Calculate Microphone SPL instantly with the exact formula and a worked example.
Microphone SPL
Source level at 1 mdB
Distance to the microphonem
Microphone sensitivitymV/Pa
Microphone max SPLdB
SPL at the microphone
112.0412dB
Output voltage
79.81mV
Output level
-22dBV
Headroom to max SPL
23dB
More about: Microphone SPL
What it calculates
The “Microphone SPL” calculator computes SPL at the microphone in dB from 4 parameters: source level at 1 m (dB), distance to the microphone (m), microphone sensitivity (mV/Pa), microphone max spl (dB).
A standard physics formula used in educational and engineering tasks.
Example calculation
With parameters Source level at 1 m = 100 dB, Distance to the microphone = 0.25 m, Microphone sensitivity = 10 mV/Pa, Microphone max SPL = 135 dB the result is 112.04 dB (Point source in a free field, no reflections).
How to use
- Enter source level at 1 m, distance to the microphone, microphone sensitivity and microphone max spl — each field above is adjustable with a slider.
- SPL at the microphone (dB) is calculated automatically as you type.
- Check the worked example below to see the formula applied to real numbers.
- Copy the result or bookmark this calculator.
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FAQ
How is Microphone SPL calculated?
The Microphone SPL calculator computes SPL at the microphone (in dB) from source level at 1 m, distance to the microphone, microphone sensitivity, microphone max spl. Enter your values above and the exact formula is applied instantly; a worked example with real numbers is shown below.
Is the Microphone SPL calculator free?
Yes. It is completely free, needs no signup, runs entirely in your browser, and sends no data to any server.
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