Sound absorption of egg boxes and trays

摘要

It is not uncommon to find amateur music rehearsal rooms covered with egg boxes as it isan economical solution to allegedly improve the acoustics. This research characterizesacoustically the use of alveolar containers for storage and transportation of food supplies.Eight distinct types of boxes for eggs and trays for fruit were analyzed, in a total of 21different arrangements and materials. The results of sound absorption coefficients (aS)measured in a reverberant chamber are presented and discussed. In summary, NRC valuesbetween 0.20 and 0.70 were obtained.