Abstract
Each chapter of this book contains diagrams, figures, tables and references. The first chapter begins by describing pass-by noise legislation as being one of the major problems that an OEM will encounter while developing a vehicle. One of the most significant sources of noise is the radiated noise levels emitted by the transmission gearbox. Unfortunately, axle whine noise, while important for both pass-by noise and interior cabin noise, is not addressed. Chapter 2 describes the fundamentals of signal processing, the FFT, zoom FFT, windowing and a brief introduction to filters. Chapter 3 introduces the reader to noise signatures of gears, gear mesh frequency, sidebands, gear rattle, periodicity of planetary gears
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