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Aeroacoustics of Low Mach Number Flows by William Devenport, Stewart Glegg

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1

Introduction

Abstract

In this chapter the subject of aeroacoustics is introduced and placed in the context of Lighthill's acoustics analogy. The important measures of subjective acoustics are discussed so that the reader can relate the sound levels discussed in the rest of the text to the levels of annoyance used to assess sound levels in noise control applications. A section on notation used in the book is also included in the chapter.

Keywords

Aeroacoustics; Lighthill; Sound waves; Turbulence; Sound levels; Annoyance; Symbol conventions

1.1 Aeroacoustics of low Mach number flows

Sound is a fundamental part of human life. We use it for social interaction, for art, for communication and education, and for understanding each other. Sound ...

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