rved that it is the more pronounced in those curves that havethe sharper resonance in their principal maxima. Observations were then obtained on imupholstered chairs andsettees. The result for chairs is shown in Fig. 10. This curve givesthe absorption coefficient per single chair. The effect was… … FiG. 9 ingly slight. The fact that it was so slight and the consequent dif-ficulty in measuring the coefficient is a partial explanation of thevariation of the results as indicated in the figure. Nevertheless itis probable that the variations there indicated have some real basis,for a repetition of…
Architectural acoustics
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