| Autor: |
Vian, Jean-Paul, Danner, William F., Bauer, Jay W. |
| Zdroj: |
Journal of the Acoustical Society of America; 1983, Vol. 73 Issue 4, p1236-1243, 8p |
| Abstrakt: |
To test the adequacy of French regulations for sound isolation in buildings, subjects were asked to rate their annoyance with samples of music filtered by electronic ''insulation curves'' representing different party walls. The insulation curves differed in their shape but all provided an A-weighted level difference of 51 dB with a pink noise source, measured over a 1/3-octave bandwidth of 40 Hz-10 kHz. However, the different insulation curves did not provide the same degree of sound isolation with various music samples due to source spectral differences. A statistically significant correlation was observed between annoyance and the A-weighted level difference ratings of the insulation curves when bandlimited pink noise (125 Hz-4 kHz) was used as a source. This correlation was not present when broadband (40 Hz-10 kHz) pink noise was used for the performance rating. Subjects showed a preference for insulation curves with steeper slopes (9 and 12 dB/oct), thus preferring a greater relative attenuation at higher frequencies. Additionally, the presence of coincidence dips was found to have an effect on subject preference that appeared to depend upon both the frequency range at which they occurred and the slope. The bandwidth of the music signals and the intelligibility of speech in the intruding sounds were also found to influence the annoyance ratings. These results indicate that the level difference method for rating sound insulation could better predict occupant response if the above results were accounted for in the procedure. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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