Apparent Sound Reduction Index Calculator

ActualapparentreductionindexR′=L1−L2+10log10(S/A),matchedband;flankingincludedinactualmeasurement,no isolatingtruepartitionR. Actual matched calibration,units,edition,geometry/measurement and model applicability independently established;not hearing/structural safety,compliance or universal perceptual prediction.

Description

Apparent sound reduction compares source and receiving room levels with a receiving-room absorption correction.

Apparent sound reduction compares source and receiving room levels with a receiving-room absorption correction.^[1]

This calculator returns a matched-band R′ that includes the measured transmission paths, rather than isolating a partition’s intrinsic transmission loss.

When to use Apparent Sound Reduction Index Calculator

Use this tool to apply the stated apparent sound reduction index calculator operation with an explicit input and unit basis.

How to use Apparent Sound Reduction Index Calculator and how it works

Establish the measurement basis and units described above.
Enter actualSourceRoomLevelDb, actualReceivingRoomLevelDb, actualPartitionArea, callerActualReceivingEquivalentAbsorptionArea and run the tool.
Read result.value using the output meanings below.
If input is rejected, correct the stated type, range, ordering or alignment issue and rerun; review successful results under the declared convention.

Input field	Meaning	Value type	Requirement
actualSourceRoomLevelDb	Source Room Level Db. Units, ordering and applicable branch are specified in the algorithm.	number	required; finite; further conditions in the algorithm
actualReceivingRoomLevelDb	Receiving Room Level Db. Units, ordering and applicable branch are specified in the algorithm.	number	required; finite; further conditions in the algorithm
actualPartitionArea	Partition Area. Units, ordering and applicable branch are specified in the algorithm.	number	required; finite; strictly positive; further conditions in the algorithm
callerActualReceivingEquivalentAbsorptionArea	Receiving Equivalent Absorption Area. Units, ordering and applicable branch are specified in the algorithm.	number	required; finite; strictly positive; further conditions in the algorithm

Require positive partition area S and receiving equivalent absorption area A in matching square units. Add 10log10(S/A) to source level minus receiving level; matched bands and measurement geometry are caller-established.

R′ = Lsource−Lreceiving+10log10(S/A)

Apply the declared units, ordering and branch conditions.

Output field	Meaning	Value type
result	Object containing the declared output fields.	object
result.value	Matched-band apparent sound reduction index R′ in dB.	number

json

{
  "input": {
    "actualSourceRoomLevelDb": 60,
    "actualReceivingRoomLevelDb": 50,
    "actualPartitionArea": 1,
    "callerActualReceivingEquivalentAbsorptionArea": 1
  },
  "output": {
    "result": {
      "value": 10
    }
  }
}

Limitations and assumptions

The output applies the declared operation to the values you supply. Establish the measurement basis, units, coefficients and any caller-selected rules before interpreting it. The tool does not independently collect or verify observations or decide whether a model or reference applies.

Supply explicit required fields with the documented types and dense aligned arrays. Unknown fields, wrong types and nonfinite numbers are rejected. Branch-specific constraints are explained above. A returned boolean, signed difference or tied result follows the stated convention; an input error instead means the required input contract was not satisfied. Very large inputs or outputs may be rejected by shared resource limits.

Alternative or Complementary methods

For a related operation, use Display RH Metal Corrosion Safety Checker. Metal conservation humidity guidance depends on alloy, condition, salts, treatments and the display environment.

For a related operation, use Traffic Noise L10 Estimate Calculator. Traffic-noise L10 describes a level exceeded for a specified portion of a measurement period or predicted under a qualified model.

References

Apparent Sound Reduction Index Calculator — tool.io

Similar or alternative tools

Display RH Metal Corrosion Safety Checker
Metal conservation humidity guidance depends on alloy, condition, salts, treatments and the display environment.
Traffic Noise L10 Estimate Calculator
Traffic-noise L10 describes a level exceeded for a specified portion of a measurement period or predicted under a qualified model.