Elements of natural philosophy (Volume 2-3) (1850)
Bartlett, W. H. C. (William Holms Chambers), 1804-1893 · New York : Barnes · leaf 99
takes place over a long andsinuous line, the different points of which are at unequal Roiling ofdistances from the auditor, and the sounds from these thunder-points can, therefore, only reach him in succession andwithout sensible intervals. § 82. When reflected sound and that proceeding di-rectly… … Ji^JK B}r its use soundsare renderedaudible thatcould not beheard without it. ear simultaneously, or nearly so, tliey strengthen eachother and become audible in positions where neithercould be heard separately. The Speaking Trumpetaffords an illustration of this. The Speaking Trumpetis a…
Mechanics · Acoustics · Optics
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