Chemical News and Journal of Industrial Science, Tom 144,Wydanie 3755Chemical news office., 1932 |
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Strona 215
... 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 equal to the total duration of the sound that is being repeated , while ...
... 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 equal to the total duration of the sound that is being repeated , while ...
Strona 216
... echo - producing conditions . Sound travels through the air as a wave of alternate compression and rarefaction , and if a reflected sound wave is retarded by the proper amount it may happen that the com- pression of the directly ...
... echo - producing conditions . Sound travels through the air as a wave of alternate compression and rarefaction , and if a reflected sound wave is retarded by the proper amount it may happen that the com- pression of the directly ...
Strona 219
... echo and reverberation in mind . A liberal use of coffering on ceiling and sloping upper walls should effectually prevent echo from this source . 1 Volume of room ( in cubic feet ) 50,000 100,000 200,000 500,000 800,000 Number of ...
... echo and reverberation in mind . A liberal use of coffering on ceiling and sloping upper walls should effectually prevent echo from this source . 1 Volume of room ( in cubic feet ) 50,000 100,000 200,000 500,000 800,000 Number of ...
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