 | Bayard Taylor - Encyclopedias and dictionaries - 1854 - 672 pages
...sound reflected or reverberated from some hard surface, and thence returned or repeated to the ear. As the undulatory motion of the air, which constitutes...to reflect a sufficient number of vibrations back, viz., such as proceed different ways, to the same place, the second will be there repeated, and is... | |
 | John Lauris Blake - Agriculture - 1857 - 508 pages
...constitutes east and west. ECHO. A sound reflected or reverberated to the ear, from some solid body. As the undulatory motion of the air, which constitutes sound, is propagated in all directions from the bounding body, it will frequently happen that the air, in performing its vibrations, will impinge against... | |
 | Samuel Maunder - Encyclopedias and dictionaries - 1866 - 884 pages
...sound : Ст.), а sound reflected from some hard surface to the ear. As tbe nndulatory motion of tbe air, which constitutes sound. Is propagated In all directions from the sounding body, 1C will frequently happen that the air, in performing lie vibrations, will impinge against various... | |
 | Samuel Maunder - Encyclopedias and dictionaries - 1880 - 904 pages
...(icho, a returned sound : ffr.), a sound reflected from some hard surface to the ear. As the nndulatory motion of the air, which constitutes sound, Is propagated in all directions from the sounding body, Ц will frequently happen that the air, in performing its vibrations, will Impinge against various... | |
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As the undulatory motion of the air, which constitutes sound, is propagated in all directions from the sounding body, it will frequently happen that the air, in performing its vibrations, will impinge against various objects, which will reflect it back,... 
