Study of the compliance of a sound intensity mapping device located in space by computer vision with conventional certified methods for measuring sound power
Mots-clés :
Acoustic intensity, Mapping, Certified method, Machine vision algorithm, Noise source, Planar surface, Reference curves, Semi-anechoic chambers, Sound intensity measurement, Sound power, Spatial referenceRésumé
A study of the compliance of a sound intensity mapping device located in space by computer vision with conventional certified methods for measuring sound power is presented. A new real-time sound intensity mapping device, the I-Track, proposes a mean of measuring sound power that is based on sound intensity probe sweeps over planar surfaces coupled to a machine vision algorithm that associates each sound intensity measurement with coordinates in a common spatial reference. The measurements were undertaken in a semi-anechoic chamber. A calibrated source, the Acculab RSS-400, was used as a noise source. A rectangular virtual volume of 110 cm by 120 cm by 120 cm was defined symmetrically around the source in order to determine the measuring areas. Notable differences were observed between the measurements data and the reference curve of the source for sound power values over 3.15 kHz. It is still unclear why there is such divergence and this issue is under investigation.
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