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Mezzo-Soprano is the second highest female voice type. In a choir, a mezzo-soprano will usually sing along the sopranos and not the altos and will be given the title of Soprano II. When the sopranos split in half, she will sing the lower melody as her timbre is darker and tessitura lower than the sopranos.
From Wikipedia, the free encyclopedia. A voice frequency (VF) or voice band is one of the frequencies, within part of the audio range, that is used for the transmission of speech. In telephony, the usable voice frequency band ranges from approximately 300 Hz to 3400 Hz. It is for this reason that the ultra low frequency band of the electromagnetic spectrum between 300 and 3000 Hz is also referred to as voice frequency, being the electromagnetic energy that represents acoustic energy at baseband.