Acoustic Test results
January 14, 2009
Last month in response to an increase of customer enquiries, Dortek's Technical Director, Les Blennerhassett travelled to Salford where acoustic tests were being carried out on our GRP doorsets.
The figures in the results table represent the “average” decibel reduction from the noise source side of the doorset to the opposite, and apply to both hinge side to frame side and frame side to hinge side.
The following doorblades were tested in a GRP frame with a standard firtree seal in the doorstop and an automatic seal at the bottom of the door.
| Door type | Results achieved |
|---|---|
| Standard K Type GRP door | 25 decibel reduction |
| Lead lined K Type GRP door | 34 decibel reduction |
| Standard F Type GRP door | 29 decibel reduction |
| Lead lined F Type GRP door | 35 decibel reduction |
The following doorblades were tested in a STAINLESS STEEL frame with seals surface mounted onto the doorstop and an automatic seal at the bottom of the door.
| Door type | Results achieved |
|---|---|
| Standard K Type GRP door | 23 decibel reduction |
| Lead lined K Type GRP door | 30 decibel reduction |
| Standard F Type GRP door | 27 decibel reduction |
| Lead lined F Type GRP door | 32 decibel reduction |
As the doorset is tested through a range of frequencies from low to high, “average” is the figure across the full range of frequencies. Dependent on a particular frequency of noise, the decibel reduction capability of the doorset may be greater.