Chemical News and Journal of Industrial Science, Tom 144,Wydanie 3755Chemical news office., 1932 |
Z wnętrza książki
Wyniki 1 - 2 z 2
Strona 215
... USUAL DEFECTS OF AUDITORIUMS . The usual defects of auditoriums are three echo , dead spots , and reverberation . In the usual sense of the term , echo means a definite or articulate repetition of a sound after an interval at least ...
... USUAL DEFECTS OF AUDITORIUMS . The usual defects of auditoriums are three echo , dead spots , and reverberation . In the usual sense of the term , echo means a definite or articulate repetition of a sound after an interval at least ...
Strona 216
... usual cause of such sound foci , how- ever , is an excessively curved wall or 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 ...
... usual cause of such sound foci , how- ever , is an excessively curved wall or 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 ...
Inne wydania - Wyświetl wszystko
Kluczowe wyrazy i wyrażenia
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