 | 1867 - 854 páginas
...fixed the lower limit of the hnimn heard by some persons who possess a sensitive e*r for lower sounds. The ascent of a single note is sometimes sufficient to produce the change from sound to silence. Two person?, neither of them deaf, may be found, the one complaining of the penetrating shrillness... | |
 | Eneas Sweetland Dallas - 1868 - 592 páginas
...house-sparrow, the sound of a cricket are unheard by some people who possess a sensitive ear for lower sounds. The ascent of a single note is sometimes sufficient to produce the change from sound to silence. Since the pitch of a sound depends upon the number of pulsations reaching the ear in a given time —... | |
 | William James Rolfe, Joseph Anthony Gillet - 1868 - 554 páginas
...sound of a small organ-pipe, the sharpness of which was far within the ordinary limits of hearing. The squeak of the bat, the sound of a cricket, even the chirrup of the English housesparrow, are unheard by some people who possess a sensitive ear for lower sounds. The... | |
 | William James Rolfe - 1868 - 328 páginas
...sound of a small organ-pipe, the sharpness of which was far within the ordinary limits of hearing. The squeak of the bat, the sound of a cricket, even the 'chirrup of the English housesparrow, are unheard by some people who possess a sensitive ear for lower sounds. The... | |
 | 1873 - 806 páginas
...house-sparrow, the sound of a cricket are unheard by some people who possess a sensitive ear follower sounds. The ascent of a single note is sometimes sufficient to produce the change from sound to silence. Since the pitch of a sound depends upon the number of pulsations reaching the ear in a given time —... | |
 | William James Rolfe - 1874 - 550 páginas
...sound of a small organ-pipe, the sharpness of which was far within the ordinary limits of hearing. The squeak of the bat, the sound of a cricket, even the chirrup of the English housesparrow, are unheard by some people who possess a sensitive ear for lower sounds. The... | |
 | John Tyndall - 1875 - 628 páginas
...sense of hearing of this person terminated at a note four octaves above the middle E of the pianoforte. The squeak of the bat, the sound of a cricket, even...people who for lower sounds possess a sensitive ear. A difference of a single note is sometimes sufficient to produce the change frqtn sound to silence.... | |
 | John Broadhouse - 1881 - 456 páginas
...sense of hearing of this person terminated at a note four octaves above the middle E of the pianoforte. The squeak of the bat, the sound of a cricket, even...people who for lower sounds possess a sensitive ear. A difference of a single note is sometimes sufficient to produce the change from sound to silence.... | |
 | 1882 - 916 páginas
...vibrations per second is the extreme for the most sensitive human ear. Tyndall says|| "that the squeak of a bat, the sound of a cricket, even the chirrup of the...people who, for lower sounds, possess a sensitive ear;" and Herschel remarks,T[ " Nothing can be more surprising than to see two persons, neither of them deaf,... | |
 | 1882 - 934 páginas
...per second is the extreme for the most sensitive human ear. Tyndall says|| "that the squeak of abat, the sound of a cricket, even the chirrup of the common...people who, for lower sounds, possess a sensitive ear;" and Herschel remarks,^ " Nothing can be more surprising than to see two persons, neither of them deaf,... | |
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The squeak of the bat, the sound of a cricket, even the chirrup of the common house-sparrow, are unheard by some people who for lower sounds possess a sensitive ear. A difference of a single note is sometimes sufficient to produce the change from sound... 
