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- Q2033445 subject Q7471018.
- Q2033445 subject Q8834659.
- Q2033445 abstract "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. 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 Nyquist–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.".
- Q2033445 wikiPageWikiLink Q11461.
- Q2033445 wikiPageWikiLink Q118093.
- Q2033445 wikiPageWikiLink Q133139.
- Q2033445 wikiPageWikiLink Q1331774.
- Q2033445 wikiPageWikiLink Q1414685.
- Q2033445 wikiPageWikiLink Q1431822.
- Q2033445 wikiPageWikiLink Q160289.
- Q2033445 wikiPageWikiLink Q209934.
- Q2033445 wikiPageWikiLink Q210868.
- Q2033445 wikiPageWikiLink Q243961.
- Q2033445 wikiPageWikiLink Q2488684.
- Q2033445 wikiPageWikiLink Q249998.
- Q2033445 wikiPageWikiLink Q263961.
- Q2033445 wikiPageWikiLink Q39369.
- Q2033445 wikiPageWikiLink Q52946.
- Q2033445 wikiPageWikiLink Q5395595.
- Q2033445 wikiPageWikiLink Q5613976.
- Q2033445 wikiPageWikiLink Q575784.
- Q2033445 wikiPageWikiLink Q679800.
- Q2033445 wikiPageWikiLink Q733553.
- Q2033445 wikiPageWikiLink Q7390.
- Q2033445 wikiPageWikiLink Q7471018.
- Q2033445 wikiPageWikiLink Q8834659.
- Q2033445 wikiPageWikiLink Q944584.
- Q2033445 comment "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.".
- Q2033445 label "Voice frequency".