Audience Absorption Reference
Explain how occupied-audience equivalent absorption must be selected and documented without publishing a universal per-person table.
Description
Audience absorption depends on frequency, seating density, clothing, posture, and seat design; use measurements or a documented design dataset for the actual seating system.
Audience absorption depends on frequency, seating density, clothing, posture, and seat design; use measurements or a documented design dataset for the actual seating system. This reference explains the selected concept and the evidence needed to interpret it.1
The returned values include Source, Statement, Topic. The How section below explains the calculation, input rules and interpretation.
When to use Audience Absorption Reference
Use Audience Absorption Reference when you need to evaluate the supplied records under the calculation and evidence rules below. The reference does not measure, model or certify the supplied situation. This is an introductory excerpt, not the complete standard, a current compliance check or a project-specific calculation.
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 Audience Absorption Reference 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 topic using the field table and calculation rules, then run the tool.
- Read source, statement, topic. 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 |
|---|---|---|---|
| topic | Reference topic to return. | string; one of "occupied-seating", "empty-seating", "area-method" | Required |
Choose one of the exact topic values in the table. The tool indexes a fixed, locally embedded reference entry and returns its source label, statement and unchanged topic. It does not fetch the source or update the wording. Topic meanings and all returned entries are shown below.
| Selection | Returned reference entry |
|---|---|
| occupied-seating | source: ISO 354 reverberation-room method and ISO 3382 room measurement context; statement: Audience absorption depends on frequency, seating density, clothing, posture, and seat design; use measurements or a documented design dataset for the actual seating system.; topic: occupied-seating |
| empty-seating | source: ISO 354 test reports for the selected seating system; statement: Empty-seat absorption can approach occupied-seat absorption when chairs are heavily upholstered, but the difference is product- and frequency-specific.; topic: empty-seating |
| area-method | source: Published room-acoustics design methods; verify the selected dataset; statement: Closely spaced audiences are commonly represented by equivalent absorption per occupied seating area rather than multiplying an isolated-person value.; topic: area-method |
selected exact topic → embedded source label, explanatory statement and topic Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| source | Source used for the reference statement. | string |
| statement | Narrow reference statement for the selected topic. | string |
| topic | Selected reference topic. | string; one of "occupied-seating", "empty-seating", "area-method" |
{
"input": {
"topic": "occupied-seating"
},
"output": {
"source": "ISO 354 reverberation-room method and ISO 3382 room measurement context",
"statement": "Audience absorption depends on frequency, seating density, clothing, posture, and seat design; use measurements or a documented design dataset for the actual seating system.",
"topic": "occupied-seating"
}
}Limitations and assumptions
The reference does not measure, model or certify the supplied situation. This is an introductory excerpt, not the complete standard, a current compliance check or a project-specific calculation.
Numeric inputs, where present, must be finite. Follow the calculation-specific rules for overflow, underflow and exceptional cases. Extremely large text inputs are rejected. Missing fields without a declared default, extra fields, wrong value types and violations of the calculation rules are input errors.
Alternative or Complementary methods
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. For a complementary task, use ASTM C423 Method Reference: ASTM C423 determines sound absorption and sound-absorption coefficients of materials by comparing reverberation-room decay with and without a specimen. This reference explains the selected concept and the evidence needed to interpret it.
References
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Audience Absorption Reference — tool.io
Similar or alternative tools
- 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.
- ASTM C423 Method Reference
ASTM C423 determines sound absorption and sound-absorption coefficients of materials by comparing reverberation-room decay with and without a specimen. This reference explains the selected concept and the evidence needed to interpret it.