e curve may be seen by comparing the dura-tions calculated by the formula with those determined from thecurve; they nowhere differ by more than .04 of a second, and have,on an average, a difference of only .02 of a second. This is entirelysatisfactory, for the calculated points fall off from the… … Fig. 5. 40 eo 80 100 120 140 160 180 200 220 240 260 280 300 Length of cushions in meters Curve showing the relation of the duration of the residualsound to the added absorbing material. the position of a, indicating that x is to be added to it, suggeststhat X and a are of a like nature, and that a…
Architectural acoustics
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