Coupled Room Volume Screen
Screen caller-supplied coupled-volume and opening ratios against explicit project thresholds without claiming a universal coupled-room criterion.
Description
A coupled-room geometry screen summarizes a secondary-room share and the connection opening per combined room volume.
A coupled-room geometry screen summarizes a secondary-room share and the connection opening per combined room volume. These ratios can guide investigation before detailed acoustic modeling.1
The returned values include Opening area per total volume, Secondary volume ratio, Meets caller thresholds. The How section below explains the calculation, input rules and interpretation.
When to use Coupled Room Volume Screen
Use Coupled Room Volume Screen when you need to evaluate the supplied records under the calculation and evidence rules below. The secondary share uses combined volume, not primary volume. No coupled decay response, modal transmission or universal coupling threshold is estimated.
Choose the measured quantities, units, weighting and measurement basis before entering values. For a reference, select the exact topic. For a catalog lookup, prepare complete source-backed records; for a screen, select an applicable caller limit.
How to use Coupled Room Volume Screen and understand its results
- Choose the measured quantities, units, weighting and measurement basis before entering values. For a reference, select the exact topic. For a catalog lookup, prepare complete source-backed records; for a screen, select an applicable caller limit.
- Enter openingAreaSquareMeters, primaryVolumeCubicMeters, secondaryVolumeCubicMeters, minimumOpeningAreaPerVolume, minimumSecondaryVolumeRatio using the field table and calculation rules, then run the tool.
- Read openingAreaPerTotalVolume, secondaryVolumeRatio, meetsCallerThresholds. The explanation below defines the units, signs, ordering and any flags or placeholder values.
- If the tool reports an input issue, correct the values and run it again. Apply the stated assumptions when interpreting a successfully returned result.
| Input field | Meaning | Value type; see rules below | Requirement |
|---|---|---|---|
| openingAreaSquareMeters | Opening area (m²) | number; minimum: 0 | Required |
| primaryVolumeCubicMeters | Primary volume (m³) | number; minimum: 0 | Required |
| secondaryVolumeCubicMeters | Secondary volume (m³) | number; minimum: 0 | Required |
| minimumOpeningAreaPerVolume | Minimum opening-area ratio (m²/m³) | number; minimum: 0 | Required |
| minimumSecondaryVolumeRatio | Minimum secondary-volume ratio | number; minimum: 0; maximum: 1 | Required |
Enter finite positive room volumes, a finite nonnegative opening area and explicit nonnegative ratio thresholds; the secondary-share threshold is at most one. Require finite combined volume and positive representable volume ratios. Return both ratios and the joint flag using inclusive minimum comparisons.
secondaryShare=secondary/(primary+secondary); openingPerVolume=opening/(primary+secondary) Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| openingAreaPerTotalVolume | Opening area per total volume (m²/m³) | number; minimum: 0 |
| secondaryVolumeRatio | Secondary volume ratio | number; minimum: 0; maximum: 1 |
| meetsCallerThresholds | Meets caller thresholds | boolean |
{
"input": {
"openingAreaSquareMeters": 10,
"primaryVolumeCubicMeters": 1000,
"secondaryVolumeCubicMeters": 250,
"minimumOpeningAreaPerVolume": 0.005,
"minimumSecondaryVolumeRatio": 0.15
},
"output": {
"openingAreaPerTotalVolume": 0.008,
"secondaryVolumeRatio": 0.2,
"meetsCallerThresholds": true
}
}Limitations and assumptions
The secondary share uses combined volume, not primary volume. No coupled decay response, modal transmission or universal coupling threshold is estimated.
Numeric inputs, where present, must be finite. Follow the calculation-specific rules for overflow, underflow and exceptional cases. Missing fields without a declared default, extra fields, wrong value types and violations of the calculation rules are input errors. A successfully returned false flag is an evaluated outcome; its meaning is explained above.
Alternative or Complementary methods
Use Double-Slope Decay Screen: A decay curve with different earlier and later slopes may indicate more than one decay process. This screen compares already fitted positive decay magnitudes. For a complementary task, use Concert Hall Volume per Seat: Room volume per seat expresses the space available per audience position. It is a geometry ratio whose interpretation depends on the room's purpose.
References
-
Coupled Room Volume Screen — tool.io
Similar or alternative tools
- Double-Slope Decay Screen
A decay curve with different earlier and later slopes may indicate more than one decay process. This screen compares already fitted positive decay magnitudes.
- Concert Hall Volume per Seat
Room volume per seat expresses the space available per audience position. It is a geometry ratio whose interpretation depends on the room's purpose.