Chemical News and Journal of Industrial Science, Tom 144,Wydanie 3755Chemical news office., 1932 |
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Strona 216
... desired amount of reverberation is found empirically to increase with the size of the auditorium . It is customary , since the pioneer work of Sabine , to define the " reverberation time of a room ( perhaps somewhat arbitrarily and ...
... desired amount of reverberation is found empirically to increase with the size of the auditorium . It is customary , since the pioneer work of Sabine , to define the " reverberation time of a room ( perhaps somewhat arbitrarily and ...
Strona 219
of space available or seating capacity desired . True , modern amplifying practice makes it possible to use a very large audi- torium for speaking , but the present discus- sion is limited to the consideration of natural features and ...
of space available or seating capacity desired . True , modern amplifying practice makes it possible to use a very large audi- torium for speaking , but the present discus- sion is limited to the consideration of natural features and ...
Strona 224
... desired by treatment with an alkaline solution , or suit- able alkaline earth , as barium hydrate . 526,089 .-- A diamond label device bearing Group Abridgments can be obtained fron the Patent Office , 25 , Southampton Build- ings ...
... desired by treatment with an alkaline solution , or suit- able alkaline earth , as barium hydrate . 526,089 .-- A diamond label device bearing Group Abridgments can be obtained fron the Patent Office , 25 , Southampton Build- ings ...
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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