Angular response of a sound intensity probe at high frequencies
Keywords:Acoustic noise, Acoustic variables measurement, Amplifiers (electronic), Approximation theory, Cables, Fast Fourier transforms, Frequencies, Microphones, Robots, Omnidirectional sources, Pink noise, Planar measurement surfaces, Pressure-residual intensity
AbstractThe measurement of the polar response of a 1/2 inch p-p intensity probe and 12 mm spacer in 1/3-octave band frequencies was studied. It was observed that the probe was mounted 2.44 m above the tweeter sound source in a frame made of 6 mm diameter steel rod. It was shown that a 1/2 inch p-p intensity probe can approximate the ideal intensity response up to 10 kHz. It was suggested that sound power measurements at 5 kHz using large planar measurement surfaces could give lower results than obtained with the same measurement over a hemispherical measurement surface.
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