Duff, A. Wilmer (Alexander Wilmer), b. 1864, ed, Guthe, Karl Eugen, 1866-1915, Hallock, William, 1857-1913, Lewis, E. Percival (Exum Percival), 1863-1925, Goodspeed, Arthur W. (Arthur Willis), b. 1860, Carman, Albert Pruden, b. 1861, McClung, Robert Kenning, 1874- · Philadelphia, P. Blakiston's Son & Co · leaf 342
ying thelength of the pipe. 382. The Voice. The pitch of the tone produced by the voice isdetermined by the length, tension and weight of the vocal cords(shown wide open in Fig. 198) which are set in vibration by the exhaled air,much as is the reed in the reed pipe.The quality of the tone is… … 326 SOUND. One vowel differs from another only in the quality of the soundas determined by the resonance cavities of the mouth and nose.Consonants are merely the particular way of starting or stoppinga vowel sound. 383. The Ear. The complete apparatus by which man hearsconsists of four distinct…
Physics
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