he high notes. The next experiment, taking them up chronologically, and per-haps next even from the standpoint of interest, was in regard to abrick wall-surface. This experiment was carried out in the constant- 88 ARCHITECTURAL ACOUSTICS temperature room mentioned in the previous papers. The… … Fig. 3 Its position in the center of the building and its depth undergroundmade it comparatively free from outside disturbing noises, — somuch so that it was possible to experiment in this room in the earlierparts of the evening, although not, of com-se, when any one else wasat work in the…
Architectural acoustics
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