Human voice is a variety of sounds produced by human vocal organs, including language and sound paradise. In general speaking, speaking with a normal voice, 1 meter from the front of the speaker, the sound pressure level is between 50 and 65 decibels, the lightest fine to the largest vocal range from about 40 to 88 decibels. The frequency range of the language is 130Hz to 350Hz. The sound pressure level of vocal music is slightly higher than that of the language. The fundamental frequencies of the children's sound range from 196 to 880Hz, the fundamental frequencies of the female voice range from 174.6 to 10476.5Hz, and the frequencies of the male voice range from 24.5 to 523Hz.
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