| 释义 |
sonometer|səʊˈnɒmɪtə(r)|
[f. sono- as combining form of L. sonus sound + -meter. In sense 1 perh. after F. sonomètre.]
1. An instrument for determining the number of vibrations made by a sonorous cord.
1808Edinburgh Encycl. (1830) I. 128/1 Sonometers are instruments intended for determining the relation between the number of undulations which constitute the several notes of music. 1829Chapters Phys. Sci. 273 In the experiments relative to this object, an instrument called a sonometer is made use of. 1873W. Lees Acoustics i. iii. 23. 1889 Brinsmead Hist. Pianoforte 40 An extremely useful instrument called the monochord or sonometer.
2. An instrument for testing the sense of hearing, or the efficacy of treatment for deafness; an audiometer.
1849Pract. Mech. Jrnl. Sept. 131 A most important instrument for the use of parties under treatment for deafness,..aptly named the sonometer. 1879[see audiometer]. 1894Daily News 14 June 6/4 Amongst the illustrations of applied science were an ingenious sonometer... It measures and tests the relative..perception of hearing.
3. Electr. A telephone attached to an apparatus for testing metals by means of an induction-coil.
1879Daily News 31 Dec. 5/4 A difference which is at once indicated by a sound in a telephone attached, which is called the sonometer. 1881Nature XXIII. 520 The sonometer is brought into the circuit. |