54—THE EFFECTS OF CONSTRUCTION PARAMETERS, SAMPLE SIZE, AND INCIDENT-SOUND LEVEL ON NOISE ABSORPTION BY CARPETING

The influence of pile parameters (height, density, and weight) on echo-loss absorption by carpets is investigated by means of a swept-frequency technique. None of the three factors is found to be significant, and it is presumed that other parameters are more important in determining the acoustic behaviour of a carpet. The size of a test sample and the incident-noise level used in the test are shown not to affect the evaluation of sound-absorbing ability.