Property
Noise reduction coefficient v1.0
Active
URL: https://opendictionary-ecstest.test-bim.com/organization/25869347-9422-4528-ac1c-65954fa4061d/dictionary/83b40007-fcbf-4120-9133-34ad346b1a12/property/46f7994e-9fb2-403e-859a-3b6d78d17c84
GUID: 7329513c-8e17-428c-bf3f-820ac87cd765
Definition
The mathematically calculated single-number rating representing the arithmetic average of sound absorption coefficients at specific mid-frequency octave bands (e.g., 250, 500, 1000, and 2000 Hz).
Description
Essential for architects and acousticians to rapidly compare the general reverberation-dampening efficiency of ceiling tiles, acoustic baffles, and wall panels.
Example
9
Technical definition
Data type
Float
Unit
Number (#)
Quantity Kind
Dimensionless Ratio
Usage
Property groups (1)
References
Reference documents (2)
- ASTM C423 Sound Absorption by Reverberation Room Method v1.0
- ISO 354 Acoustics Sound Absorption v1.0