On Some Problems with Vibroacoustic LDV Measurements for Windows

Acoustic insulation of 2 and 3-wings windows was tested with the help of a laser Doppler vibrometer (LDV). LDV in window research could, for example, check the correctness of the window fixing and determine the map of acoustic energy passing through the window. During testing, a very large 3-wing window, overheating of the loudspeaker occurred in the transmitting chamber and jumps in the emitted acoustic power appeared. For the saving of the measurement results after overheating the loudspeaker, the correction of results in the final part of the examined area was applied. Problems with correcting these results are described in the article.