Chemical News and Journal of Industrial Science, Tom 144,Wydanie 3755Chemical news office., 1932 |
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Strona 215
... ceilings . Exam- ples of this may be seen in many theatres of modern construction . The ceiling , and in some cases , the proscenium arch , are broken up into depressions about 4 feet square , con- taining a succession of steps ...
... ceilings . Exam- ples of this may be seen in many theatres of modern construction . The ceiling , and in some cases , the proscenium arch , are broken up into depressions about 4 feet square , con- taining a succession of steps ...
Strona 216
... ceiling which concentrates the sound to a focus . Since dead spots and sound foci arise from the same cause as echo their removal may be brought about by the same treatment . Some care and experience is necessary in order to locate the ...
... ceiling which concentrates the sound to a focus . Since dead spots and sound foci arise from the same cause as echo their removal may be brought about by the same treatment . Some care and experience is necessary in order to locate the ...
Strona 218
Wood floor Plaster ceiling Plaster walls Stage opening ( no furni- ture , bare walls ) Wooden seats 4.550 x 0.08 = 137 ... ceiling area should not be sufficient , the upper portion of the walls may be treated also . It is not ad- visable ...
Wood floor Plaster ceiling Plaster walls Stage opening ( no furni- ture , bare walls ) Wooden seats 4.550 x 0.08 = 137 ... ceiling area should not be sufficient , the upper portion of the walls may be treated also . It is not ad- visable ...
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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