th of the first proposition — the general applicabilityof the hyperbolic law of inverse proportionality — can be satis-factorily shown by a condensed statement of the results obtainedfrom data collected early in the investigation. These observationswere made in rooms varying extremely in size and… … 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 ICO120 180 240 300 360 420 540 TZO 900 1080 1360 Total absorbing material Fig. 10. The curves of Figs. 8 and 9 entered as parts of their corre-sponding rectangular hyperbolas. Three scales are employed forthe volumes, by groups 1-7, 8-11, and 12.…
Architectural acoustics
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