J. Phys. IV France 02 (1992) C1-431-C1-434
CALIBRATION DE SONDE INTENSIMÉTRIQUE EN TUBE À ONDE STATIONNAIREH. PÉPIN and T.M. PHAN
CETIM, Département Acoustique Industrielle, 52 Avenue Félix Louat, BP. 67, F-60300 Senlis cedex, France
The performance of acoustic intensimetry using the two-microphone technique depends on the accuracy of the calibration of the measurement system, involving both the probe and the intensity processor. The recent ISO/IEC 1043 draft standard implies the use of high precision laboratory calibrators for frequency reponse, phase mismatch and directivity measurements. A calibration method in a standing wave tube has been developped in CETIM with respect to be IEC specifications. Depending on the acoustic field generated in the tube, for a given standing wave ratio, one can measure the intensity probe caracteristics, including diffraction effect and directivity curves.
© EDP Sciences 1992