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GLAUNACH
GLAUNACH THE SILENCER HANDBOOK NOISE A GENERAL INTRODUCTION INTO NOISE AND ITS PREVENTION GLAUNACH GMBH 2010 - ALL RIGHTS RESERVED -THE SILENCER HANDBOOK Part I | page 2 of 8 GLAUNACH GMBH Edition 2010 RULE OF THUMB each doubling of distance equals 6 dB noise (pressure level) reduction 1. NOISE LEVEL MEASURES Acoustic energy is commonly characterised by two different, often confused terms: Sound Power Level and Sound Pressure Level. The two parameters share the dimension unit Decibel [dB] and the term Sound Level. To comprehend how to specify, measure and reduce sound, it is important to understand the difference between these properties, which must not be interchanged.
THE SILENCER HANDBOOK Part I | page 4 of 8 © GLAUNACH GMBH Edition 2010 Example Calculation of an A-weighted Octave Band Frequency [Hz] Measured L …
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