Wedge Performance

A Production sample from every 100 units is tested to verify design, materials, and cut-off frequency. The test is conducted in accordance with the Impedance Tube Method- ASTM-C 384-90a. Wedges or sound absorbing elements shall have a low frequency cut-off in Hertz (Hz). Above this frequency, they shall have a coefficient of absorption value of 0.99, or a ratio of reflected sound pressure to incedent sound pressure of 10% or less.

Chamber Performance

 

 

After the full installation of the Chamer is complete, a test shall be conducted to guarantee chamber performance.

The test is conducted in accordance with ISO 3745: Inverse Square Law, ANSI 12.35 1990 (R1996). Wedges or sound absorbing elements shall have a low frequency cut-off in Hertz (Hz).

Above this frequency, they shall have a coefficient of absorption value of 0.99, or a ratio of reflected sound pressure to incedent sound pressure of 10% or less.

 

 

 

Noise Reduction, Attenuating Structures

Single Wall Panel Room

Double Wall Room