When making measurements around a noise source with a sound intensity probe, the position of the probe is required to create a noise map. Usually the measurement positions are fixed on a grid or are traced with an IR system. In this paper a case study is presented in which an innovative 3D measurement system for the positioning of the sound intensity probe is used. The position detection system uses acoustic waves to locate a point in three-dimensional space. The result is similar to what is obtained with beamforming systems, with the advantage that by carrying out a series of measurements with an intensity probe it was possible to analyse the noise emissions in a very precise and punctual way, with the desired spatial resolution (within the directionality limits of the acoustic waves that is a function of frequency). In addition, the positioning system is economical and requires just a multichannel soundcard and few other components.
Guidorzi P., Barbaresi L., Giovannucci M., Piazza T., Pesso T., Garai M. (2020). Analysis of noise emitted by an engine using an innovative 3D microphone positioning system. Seoul : Korean Society of Noise and Vibration Engineering.
Analysis of noise emitted by an engine using an innovative 3D microphone positioning system
Guidorzi P.;Barbaresi L.;Garai M.
2020
Abstract
When making measurements around a noise source with a sound intensity probe, the position of the probe is required to create a noise map. Usually the measurement positions are fixed on a grid or are traced with an IR system. In this paper a case study is presented in which an innovative 3D measurement system for the positioning of the sound intensity probe is used. The position detection system uses acoustic waves to locate a point in three-dimensional space. The result is similar to what is obtained with beamforming systems, with the advantage that by carrying out a series of measurements with an intensity probe it was possible to analyse the noise emissions in a very precise and punctual way, with the desired spatial resolution (within the directionality limits of the acoustic waves that is a function of frequency). In addition, the positioning system is economical and requires just a multichannel soundcard and few other components.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
