 | John Rowning - Astronomy - 1744 - 470 pages
...undulatory Motion1 of the Air, •which conftitutes Sound, is propagated in all Dire&ions from the founding Body; it will frequently happen, that the Air, in performing its Vibrations, will impinge againft various Objefts> which will reflect it back, and fo caufe new Vibrations the contrary Way ;... | |
 | John Rowning - Astronomy - 1753 - 476 pages
...Succeffion of them will be flower and the Progrefs of the Sound proportionably retarded *. WHEREAS the undulatory Motion of the Air, which constitutes Sound, is propagated in all Directions from the founding Body, it will frequently happen, that the Air in performing its Vibrations will impinge againft... | |
 | Edward Augustus Kendall - Encyclopedias and dictionaries - 1811 - 962 pages
...in toys and marquetry. ECHO, a sound reverberated or reflected to th* ear from some solid body. As the undulatory motion of the air, which constitutes...are so situated as to reflect a sufficient number of such vibrations as proceed dift'erent ways to the same place, the sound will be there repeated, and... | |
 | Edward Augustus Kendall - 1811 - 474 pages
...in toys and marquetry. ECHO, a sound reverberated or reflected to the ear from some solid body. As the undulatory motion of the air, which constitutes...are so situated as to reflect a sufficient number of such vibrations as proceed different ways to the same place, the sound will be there repeated, and... | |
 | John Lauris Blake - Encyclopedias and dictionaries - 1834 - 1028 pages
...the worst of all evils. ECHO. A sound reverberated or reflected to the ear, from some solid body. As the undulatory motion of the air, which constitutes...objects, which will reflect it back, and so cause ni-w vibrations the contrary way. Now, if the objects ave во situated as to reflect a sufficient... | |
 | Samuel Maunder - Encyclopedias and dictionaries - 1843 - 914 pages
...reflected or reverberated > from some hard surface, and thence re- I turned or repeated to the ear. As the undulatory motion of the air, which constitutes...it back, and so cause new vibrations the contrary wayi DOW if the"ohject3 are so situated as to reflect a sufficient number of vibrations back, viz.... | |
 | GEORGE RIPLEY - 1852 - 670 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...sounding body, it will frequently happen that the air, in pefforming its vibrations, will impinge against various objects, which will reflect H buck, and so... | |
 | Encyclopedias and dictionaries - 1852 - 678 pages
...in all .Unctions from the sounding body, it will frequently happen that the ¡iir, in performing it* vibrations, will impinge against various objects,...will reflect it back, and so cause new vibrations tbe contrary way ; now if the objecte are so situated as to reflect a sufficient number of vibrations... | |
 | Samuel Maunder - 1853 - 852 pages
...thence returned or repeated to the ear. As the undulatory motion of the air, which constitutes sound, ia propagated in all directions from the sounding body,...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 called... | |
 | Samuel Maunder - Encyclopedias and dictionaries - 1853 - 872 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...against various objects, which will reflect it back, and BO cause new vibrations the contrary way: DOW if the objects are so situated as to reflect a sufficient... | |
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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,... 
