Chemical News and Journal of Industrial Science, Tom 144,Wydanie 3755Chemical news office., 1932 |
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Strona 216
... floor , and ceiling , a portion being absorbed at each reflection until its intensity is so reduced that it becomes inaudible . Owing to the high speed of sound there may be many such reflections in the course of a single second in a ...
... floor , and ceiling , a portion being absorbed at each reflection until its intensity is so reduced that it becomes inaudible . Owing to the high speed of sound there may be many such reflections in the course of a single second in a ...
Strona 218
Wood floor Plaster ceiling Plaster walls Stage opening ( no furni- ture , bare walls ) Wooden seats 4.550 x 0.08 = 137 4.550 x .03 = 137 5,320 x .03 = 160 600 × .25 = 150 500 x .25 = 125 Total absorption of empty room ... 709 For the ...
Wood floor Plaster ceiling Plaster walls Stage opening ( no furni- ture , bare walls ) Wooden seats 4.550 x 0.08 = 137 4.550 x .03 = 137 5,320 x .03 = 160 600 × .25 = 150 500 x .25 = 125 Total absorption of empty room ... 709 For the ...
Strona 222
... floor paints , light and dark grey , as well as terra cotta are preferred for cement or wood floors . A dislike has developed on the part of the public for maroon and dark brown shades for floor paints to an extent that some retailers ...
... floor paints , light and dark grey , as well as terra cotta are preferred for cement or wood floors . A dislike has developed on the part of the public for maroon and dark brown shades for floor paints to an extent that some retailers ...
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absorbing absorption acid acoustic activity application Arts Association atom audience auditorium becomes bibliographies British cause ceiling cent Chemical chemistry coefficient complete contained cost cubic desired echo effect electricity electron element example excess existing experiment experimental expressed fact feet floor formation formula give given heat held hydrogen hydrogen ion importance increase industry intensity interest later less light lines London Manufacture March Marks material means measured metals methods million molecules necessary obtained Office optical ordinary organic organisation oxygen Patents plants Plaster possible present produced quantity references reflected reflected sound result reverberation Royal Sabine Science scientific seats Society solid solution sound space speaking specific spectrum square substances TABLE term theory tion total absorption Trade units University usual volume walls Watson weight window