Reference: audienceHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Dalenbäck, Datensatz der CATT-Software, November 2000. Data-Category in CATT: AUDIENCE_072, C: Audiences, D: Audience
Value from the PTB table, not verified
Audiences, audience area, 0.72 persons/m²
PTB reference data
Original description
Audiences, audience area, 0.72 persons/m²
Material properties
Density: 0.72 persons/m²
Application: audience area
Measurement data
Sound absorption
Reverberation chamber (ASTM C423 / ISO 354)
Values per m² of audience area, not per chair or person.
NRC
0.50
derived from ISO 354 lab data
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.10 | 0.20 | 0.40 | 0.65 | 0.75 | 0.70 |
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Value from the PTB table, not verified
NRC: 0.50 (derived from ISO 354 lab data)
Measured values as a table (1 measurement)
| Build-up | NRC | 125 Hz | 250 Hz | 500 Hz | 1000 Hz | 2000 Hz | 4000 Hz |
|---|---|---|---|---|---|---|---|
| 0.72 persons / m2 | 0.50 | 0.10 | 0.21 | 0.41 | 0.65 | 0.75 | 0.71 |
Measured values as a table (1 measurement)
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