| 单词 | phonasthenias |
| 释义 | phon /fon/noun (acoustics)A unit of loudness, the number of phons of a particular sound being equal to the number of decibels of a pure tone (with a frequency of 1000 hertz) judged, or proved by measurement, to be of the same loudness combining form /fōn-/Sound, voice ORIGIN: From Gr phōnē sound phonal /fōnˈl/ adjective Vocal phonasthenia /fō-nas-thēˈni-ə/ noun
phonautograph /fōn-öˈtə-gräf/ noun An instrument for recording sound vibrations phonautographic /-grafˈik/ adjective phonautographˈically adverb phonmeter /fonˈmē-tər/ or phonometer /fə-nomˈi-tər/ noun (Gr metron measure) an apparatus for estimating loudness levels in phons phoˈnon noun (physics) A quantum of vibrational energy in a crystal lattice, induced by heat |
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