Rabu, 28 Maret 2018

A voice frequency (VF) or voice band is one of the frequencies, within part of the audio range, that is being 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. The bandwidth allocated for a single voice-frequency transmission channel is usually 4 kHz, including guard bands, allowing a sampling rate of 8 kHz to be used as the basis of the pulse code modulation system used for the digital PSTN. Per the Nyquistâ€"Shannon sampling theorem, the sampling frequency (8 kHz) must be at least twice the highest component of the voice frequency via appropriate filtering prior to sampling at discrete times (4 kHz) for effective reconstruction of the voice signal.

Fundamental frequency




Human voice frequency components analysis - Human voice frequency components analysis .

The voiced speech of a typical adult male will have a fundamental frequency from 85 to 180 Hz, and that of a typical adult female from 165 to 255 Hz. Thus, the fundamental frequency of most speech falls below the bottom of the "voice frequency" band as defined above. However, enough of the harmonic series will be present for the missing fundamental to create the impression of hearing the fundamental tone.

See also


CHAKRA FREQUENCIES AND CORRELATIONS - Chakrakey
CHAKRA FREQUENCIES AND CORRELATIONS - Chakrakey. Source : www.chakrakey.com

  • Formant
  • Human voice
  • Vocal range
  • Hearing (sense)

References


How deep does a deep voice go? - low end frequency bandwidth of a ...
How deep does a deep voice go? - low end frequency bandwidth of a .... Source : www.avsforum.com

 This article incorporates public domain material from the General Services Administration document "Federal Standard 1037C" (in support of MIL-STD-188).


good frequencies of piano - Google Search | Sound production ...
good frequencies of piano - Google Search | Sound production .... Source : www.pinterest.com

 
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