Acoustic Noise dB Calculator
Actual energy-average acoustic sound pressure level dB from equal-exposure positive RMS windows, reference/weighting/distance external; not arithmetic mean of dB, diagnostic noise or safe hearing prediction.
Description
Sound-pressure levels combine squared RMS pressures on a specified reference and exposure basis.
Sound-pressure levels combine squared RMS pressures on a specified reference and exposure basis.1
This tool calculates an energy-average decibel level across equal-duration windows without determining hearing safety.
When to use Acoustic Noise dB Calculator
This tool calculates an energy-average decibel level across equal-duration windows without determining hearing safety.
How to use Acoustic Noise dB Calculator and how it works
- Prepare calibrated rms acoustic pressure by equal window, acoustic reference pressure pa, using the input definitions and matching units below.
- Enter the required fields and run Acoustic Noise dB Calculator.
- Read result.value using the units, signs and ordering explained below.
- Correct any rejected inputs and rerun; interpret the result within the stated model and its assumptions.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| actualCalibratedRmsAcousticPressureByEqualWindow | Positive RMS sound pressures in Pa for independently established equal-duration windows. | array of number | Required; other constraints below |
| callerAcousticReferencePressurePa | Positive acoustic reference pressure in Pa; weighting and calibration are external. | number | Required; strictly positive; finite; other constraints below |
Require a nonempty list of positive calibrated RMS pressures for equal-duration windows and positive reference pressure in Pa. Square and average pressures, divide by reference pressure squared and take 10*log10. Return dB on that supplied reference basis; weighting, calibration, duration matching, distance and hearing interpretation are not assessed.
levelDb=10*log10(mean(rmsPressurePa^2)/referencePressurePa^2) Apply the input ordering, units and branch conditions stated above.
| Output field | Meaning | Value type |
|---|---|---|
| result | Object containing the calculated or selected fields below. | object |
| result.value | Energy-average sound-pressure level in dB relative to the supplied reference. | number |
{
"input": {
"actualCalibratedRmsAcousticPressureByEqualWindow": [
1,
4.358898943540674
],
"callerAcousticReferencePressurePa": 1
},
"output": {
"result": {
"value": 10
}
}
}Limitations and assumptions
The calculation uses the supplied observations and model inputs. It does not collect measurements, select a reference population or coefficient, or establish that the model applies to the actual case. The stated branch conditions and output units remain part of the result.
All fields require explicit values. Unexpected fields, wrong types, nonfinite numbers and sparse arrays are rejected. Alignment, bounds and supported-token rules are explained above; extremely large inputs or nonfinite results can also fail. Input errors differ from successful false comparisons, unavailable-domain flags and empty match lists.
Alternative or Complementary methods
Use Shim Current Lookup for a complementary operation: Shim current information depends on the scanner, coil basis and applicable calibration context.
Use dB/dt Lookup for a complementary operation: A dB/dt reference concerns a magnetic-field derivative under specified waveform and location conditions.
References
-
Acoustic Noise dB Calculator — tool.io
Similar or alternative tools
- Shim Current Lookup
Shim current information depends on the scanner, coil basis and applicable calibration context.
- dB/dt Lookup
A dB/dt reference concerns a magnetic-field derivative under specified waveform and location conditions.