WoodHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: C.M.Harris, Noise Control in Buildings, McGraw Hill 1994
Value from the PTB table, not verified
Wood fibers with portland cement binder, with 2 1/2 inch fiberglass batts in cavities between furring
Type M-173 – Fibroplank
PTB reference data
Original description
Wood fibers with portland cement binder, with 2 1/2 inch fiberglass batts in cavities between furring
Material properties
Manufacturer: Martin Fireproofing Georgia
Thickness: 1 1/2 inch
Wall distance: 40 mm
Backing: 2 1/2 inch fiberglass batts
Surface: perforated facing
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.80
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.40 | 0.80 | 1.00 | 0.75 | 0.80 | 0.90 |
Create a permanent free account — Access frequency bands, variants and export.
Free. No password required.
Value from the PTB table, not verified
Measured values as a table (1 measurement)
| Build-up | αw | 125 Hz | 250 Hz | 500 Hz | 1000 Hz | 2000 Hz | 4000 Hz |
|---|---|---|---|---|---|---|---|
| 1 1/2 inch · 5 lb/ft² · covered with perforated facing, airspace 40 mm | 0.80 | 0.39 | 0.82 | 1.23 | 0.75 | 0.81 | 0.92 |
Measured values as a table (1 measurement)
Access frequency bands, variants and export. Create a permanent free account
Last updated: