Exhaust Noise Reduction by Application of Expanded Collecting System in Pneumatic Tools and Machines

In this paper, we demonstrate how to reduce the noise level of expanded air from pneumatic tools. Instead a muffler, propose collecting system, where expands through tube and expansion collector. We have elaborated mathematical model which illustrates dynamics flow, as well acoustic pressure at end tube. The computational results were compared with experimental data check sound pressure. Moreover, study presents methodology measurement generated in screwdriver quiet back room on window-fitting stand production hall. addition, performed measurements for an industrial scale. These prove reduction tools when system is used. When was applied screwdriver, measured Sound Pressure Level (SPL) decreased 87 80 dB(A).