| 单词 | voice |
| 释义 | voice Sounds made through the mouth by humans while talking, singing, or otherwise audibly commu- nicating through the use of vocal organs. Although human voice frequencies mostly fall in the range of 100–8,000 Hz, the energy in the speech spectrum peaks at approximately 500 Hz, with most articulation at higher frequencies. Human hearing can distinguish signals as low as 20 Hz and as high as 20 kHz, and is most sensitive in the range of 1,0003,000 Hz. Human-to-human voice communications seldom requires technical support over short distances.Voice communications over distances of more than a few meters, however, requires that the acoustical energy be converted into some form of electromagnetic energy and sent over a transmission system of some description. See also transmission system and voice grade. |
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