Intercomparison measurements of room acoustical parameters and speech intelligibility measures were performed in a 1500-m3 room containing a sound system. The parameters included the octave-band reverberation times T20 and T30 averaged over the entire room, the speech intelligibility indices STI, STI(mod), STI(male), STI(female), RASTI, and %ALcons, the frequency response in one-third-octave bands, and the room acoustical parameters EDT, C80, C50, D50, and Ts at various positions in accordance with ISO 3382. The measurements carried out by 15 participants from Switzerland were compared. As far as can be ascertained, two main factors appear to be responsible for the spread in results. On the one hand, the noise disturbances, at times quite strong, seemed to pose difficulties for the participants. Frequently too little attention was paid to achieving an adequate signal-to-noise ratio. Furthermore, for some measurements the results of certain participants diverged greatly from those of others, partly as a result of incorrect settings of the instruments. In the measurement analysis the standard deviations were compared to the perception thresholds. When the data from a few conspicuous participants were eliminated, the standard deviations were often within the region of the perception thresholds.
Click to purchase paper as a non-member or you can login as an AES member to see more options.
No AES members have commented on this paper yet.
To be notified of new comments on this paper you can
subscribe to this RSS feed.
Forum users should login to see additional options.
If you are not yet an AES member and have something important to say about this paper then we urge you to join the AES today and make your voice heard. You can join online today by clicking here.
