A novel setup for sound power level measurement

A novel setup for measuring sound power emitted by an automobile engine has been designed and fabricated in this study. Sound pressure levels have been measured to compute sound power level as per ISO Standard 3744. A microphone traversing system has been designed and fabricated to measure sound pressure at various points on a spatial grid Sound pressure level and spectra have been measured at these points for various operating conditions of throttle opening and speed. The setup seems to be a cost-effective option for automobile engine industry for power level certification and for online silencer design.