The Use of Lotus 1-2-3 to Estimate Noise Reduction Through Absorption

Abstract Noise exposure has always been one of the greatest problems faced by industrial hygienists. To combat these problems, hygienists have developed a range of noise control procedures, one of which is noise absorption. This relatively simple and inexpensive technique can often achieve noise reductions of 5 to 10 dBA. Unfortunately, the complexity and tedium of the noise reduction calculations can intimidate some people and result in the poor design of noise control installations. This article describes the basic calculations involved in the reduction of noise through absorption. As well, a microcomputer program using Lotus 1-2-3 is discussed. The computer program estimates the noise reduction in a room due to the application of absorptive materials. The inputs required are an initial octave band analysis, room dimensions, and absorption coefficients. An example of the noise absorption calculations and the use of the program is given as well as sample costs. It is recommended that sound absorption in ...