Introduction

To apply Sound Power Level Ratings in the design of an air system, the engineer must understand what these ratings are and he must appreciate their limitations. For the many design engineers who are not yet familiar with the techniques of applying acoustical data, this publication may serve as an introduction to the subject.

Before undertaking any system design calculations using Sound Power Level Ratings, the chapter on "Sound Control Fundamentals" in the ASHRAE Handbook of Fundamentals should be reviewed. The reference list included in the chapter will also provide a good starting point for a detailed study of this subject.

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