The Nation's Schools, Količina 18Michael Vincent O'Shea McGraw Hill, 1936 |
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Zadetki 1–3 od 84
Stran viii
... sound waves . Thus revar- beration is stopped . PLASTER www IT GETS DIRTY- Impaired Light Reflection PLASTER Unimpaired Sound Absorption www YOU PAINT IT- Original Good Light Reflection PLASTER Sound Absorption Painting Acousti to ...
... sound waves . Thus revar- beration is stopped . PLASTER www IT GETS DIRTY- Impaired Light Reflection PLASTER Unimpaired Sound Absorption www YOU PAINT IT- Original Good Light Reflection PLASTER Sound Absorption Painting Acousti to ...
Stran 49
... sound control problem . Sound is a form of wave energy which is emitted from a vibrating source in concentric spherical waves . It travels , under ordinary conditions , at the speed of about 1,120 feet per second , or as fast as a rifle ...
... sound control problem . Sound is a form of wave energy which is emitted from a vibrating source in concentric spherical waves . It travels , under ordinary conditions , at the speed of about 1,120 feet per second , or as fast as a rifle ...
Stran 50
... sound orig- inating at the circulating fans may be distributed through the ventilating ducts to the entire building . Sound absorbing materials in the form of porous fiberboard or felt may be used to line sections of ventilating ducts ...
... sound orig- inating at the circulating fans may be distributed through the ventilating ducts to the entire building . Sound absorbing materials in the form of porous fiberboard or felt may be used to line sections of ventilating ducts ...
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Acousti-Celotex administration adult American American Type Founders appointed architects Asso auditorium Autosan board of education boys cafeteria catalog cation cent Chicago classroom clean College color Columbia University committee Company construction cost County course Culver Military Academy curriculum director economic educa elementary school enrollment equipment experience film girls grade guidance gymnasium heating HOTEL Hygieia installation institutions instruction interest Junior High School laboratory locker lunchroom material Medart ment Mercurochrome method modern MODERN AMERICAN SCHOOLS Nation's Schools National National Education Association Ohio Ohio State University operation organization p.m. CBS practice principal problems projector Public Schools pupils radio school buildings school district school system soap social sound superintendent of schools teachers teaching tion tional unit University vocational walls Write York City