Bauhaus-Universität Weimar

Titel:
Collected Papers On Acoustics
Person:
Sabine, Wallace Clement
PURL:
https://digitalesammlungen.uni-weimar.de/viewer/image/lit39364/244/
ARCHITECTURAL ACOUSTICS 
23 5 
tribut ion of intensity would still have been bilaterally symmetrical, 
but not symmetrical about the transverse axis. 
When a source of sound is maintained constant for a sufficiently 
long time — a few seconds will ordinarily suffice—the sound becomes 
steady at every point in the room. The distribution of the intensity 
Fig. 14 Fig. 16 
of sound under these conditions is called the interference system, 
for that particular note, of the room or space in question. If the 
source of sound is suddenly stopped, it requires some time for the 
sound in the room to be absorbed. This prolongation of sound after 
the source has ceased is called reverberation. If the source of sound, 
instead of being maintained, is short and sharp, it travels as a dis¬ 
crete wave or group of waves about the room, reflected from wall to
        

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