J. Phys. IV France 02 (1992) C1-457-C1-460
MISE AU POINT D'UNE TECHNIQUE D'INTENSIMÉTRIE POLAIRE : PERSPECTIVES D'UTILISATIONJ.G. MIGNERON, P. LEMIEUX and M. LEVAVASSEUR
Laboratoire d'Acoustique de l'Université Laval, CRAD 1636, Pavillon Félix-Antoine Savard, Québec G1K 7P4, Canada
A robotic apparatus was designed and developed to take rapidly polar sound intensity measurements. This technique has a double dimension : it entails the expression of the relationship between the polar information and the standard acoustical parameters (pressure, simple vectorial composition of the flux line or complexe temporal and vectorial composition), and secondly, the robotic handling of the sound intensity probe. The robot can be interfaced, through a PS/2 computer, to dual channel third octave real time analyser or to double FFT analyser. It can use an orthogonal routine, allowing a fast reading of the three vectorial components in a stationary acoustical mode, and it can be programmed to search automatically the maximum intensity level for the determination of the flux line or, in near field, with the aim of reactive intensity. In addition to conducting polar sound intensity experiments in stationary regime and in laboratory conditions, potential utilization of this technique was developed for complex industrial acoustical fields or for architectural acoustics.
© EDP Sciences 1992