What is a voice frequency?
different signals ranges along the electromagnetic (EM) spectrum are classified according to the size of the wavelengths. These include visible, microwave and radio belts. The voice frequency concerns both the sound range of voice transmission, the most detectable for the human ear and the voice frequency band used by telecommunications networks for speech transmission. These bands generally range from 300 Hertz (Hz) to approximately 3000-4000 Hz. Due to the human ear intelligence in understanding and speech analysis, voice communication can occur in a broader dynamic range than digital data. Data transfer to human language transfer lines requires transmission parameters. This may include the use of modulator-demodulator technology (MODEM) that basically converts data into analog tones. The NNA thread on the other side of the ETWORKS translates vocal and data communication into fast light pulses.
The communication zones are divided into three degrees: a narrow band, voice zone and broadband. The narrow zone bears sigFax and Teletype from 0 to 300 Hz. The voice zone, or the voice frequency zone, works up to 300 to 4000 Hz to suit the wider data range through dial and rented lines.
broadband connects the gearbox over 4000 Hz. These voice channels of analog transmission may be a bundle. Digital voice transmission and data complete these techniques of point-to-point transmission.
Human hearing occurs between 20 Hz to 20 kilohertz (kHz); It is the strongest between 300 Hz and 5 kHz. Adult men can speak from 85 to 180 Hz, while adult women communicate from 165 to 255 Hz. However, the width of the telephone zone often occurs around 4 kHz, including the Guard Bands. This can accommodate the individual voice frequency signals that are connected to broadband transmissions.
Ultralow frequency belt between 300 and 3000 Hz includes acoustic energy in baseband or zero up to maximum bandwidth for voice transmission. This group is called voice frequency (VF) or voice zone. For digital communication, voice frequency transmission per second or its sampling frequency can be removed, usually 8 kHz.
This is known as the modulation of pulse code (PCM), digital representation of analog vocal signals. In other words, these bandwidth allocations allow human voices to share the same transmission channels with minimal interference as other types of data. Messages can be sent intact and reinforced back to the auditory range of the human ear.