Chemical News and Journal of Industrial Science, Tom 144,Wydanie 3755Chemical news office., 1932 |
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Strona 215
... walls , ceilings , or proscenium arches , just as a mirror may reflect a beam of light without scattering it . If , however , the surface of the mirror be roughened the reflected light will be diffused in all direc- tiins ; and if the walls ...
... walls , ceilings , or proscenium arches , just as a mirror may reflect a beam of light without scattering it . If , however , the surface of the mirror be roughened the reflected light will be diffused in all direc- tiins ; and if the walls ...
Strona 216
... walls , 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 ...
... walls , 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 ...
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 ...
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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