The use of acoustic intensimetry to size air leakage cracks. Akustische Intensitatsmessung zur Grossenbestimmung von Leckageoffnungen.

The sound intensity technique and reverberant sound excitation have been used for the measurement of sound transmission loss through narrow slits in rigid walls. As predicted by theory, the dimensions of the apertures determine the magnitudes andresonant frequencies of the sound transmission loss curves. It should thus be possible in principle to size air leakage cracksusing the technique described in this paper.