Introduction controlling nuisance is a key issue in order to have a healthy and pleasant envi ronment.
Absorption coefficient of carpet.
Absorption coefficients building materials finishes acoustic acoustic absorbing material absorbtion floor seating wall ceiling miscellaneous materials eberhard sengpiel sengpielaudio.
Absorption coefficients of common building materials and finishes floor materials 125 hz 250 hz 500 hz 1 khz 2 khz 4 khz carpet 0 01 0 02 0 06 0 15 0 25 0 45 concrete unpainted rough finish 0 01 0 02 0 04 0 06 0 08 0 1 concrete sealed or painted 0 01 0 01 0 02 0 02 0 02 0 02 marble or glazed tile 0 01 0 01 0 01 0 01 0 02 0 02 vinyl tile or linoleum on concrete 0 02 0 03 0 03 0 03 0 03 0 02 wood parquet on concrete 0 04 0 04 0 07 0 06 0 06 0 07 wood flooring on joists 0 15 0 11 0 1 0 07.
One of the most important health problems caused.
One of the important results was the significant increase in the absorption coefficient in the low and medium frequency range 250 1000 hz when there was an air gap behind tufted carpet used as a wall covering.
Absorption coefficients www akustik ua frequency hz material thickness 125 250 500 1000 2000 4000 masonry walls rough concrete 0 02 0 03 0 03 0 03 0 04 0 07 smooth unpainted concrete 0 01 0 01 0 02 0 02 0 02 0 05 smooth concrete painted or glazed 0 01 0 01 0 01 0 02 0 02 0 02 porous concrete blocks no surface finish 0 05 0 05 0 05 0 08 0 14 0 2.
Remember that there is a range of nrc for many of these products.
A noise reduction coefficient nrc is used in grading the effectiveness of material employed for sound control.
The tests described in these reports were carried out at the request of interface to determine the sound absorption coefficients of a sample of cushionbacre carpet tiles without additional underlay.
For instance acoustic ceiling tiles can range from a 0 45 absorption coefficient to 0 85 for some of armstrong s higher end acoustic tiles.
Understanding the acoustical values of carpet constructions and the combinations of specific carpet cushions is important.
Sound absorption coefficients the fraction of incident sound energy that is absorbed by the material vary strongly with frequency.
Similarly carpets range in thickness and plushness which will greatly affect how much sound is absorbed by them.
Absorption coefficient insertion loss carpet felt sound propagation 1.
Absorption coefficients of common building materials and finishes.
Carpet 0 01 0 02 0 06 0 15 0 25 0 45 concrete unpainted rough finish 0 01 0 02 0 04 0 06 0 08 0 1 concrete sealed or painted 0 01 0 01 0 02 0 02 0 02 0 02 marble or glazed tile 0 01 0 01 0 01 0 01 0 02 0 02 vinyl tile or linoleum on concrete 0 02 0 03 0 03 0 03 0 03 0 02 wood parquet on concrete 0 04 0 04.
