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Why is the ac frequency in the range 20 Hz to 20 kHz called audio frequency?
Wiki User
∙ 14y ago
Because the theoretical hearing limits of the human ear (in very young people who do not listen to loud music) is 20 Hertz to 20,000 Hertz. People with extremely good ears can hear musical tones as low as 20 Hz and as high as 20 kHz.
Wiki User
∙ 14y ago
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What is the frequency range used in wireless communication?
2.4GHz is used & OFDM
What is the frequency of tsop 1738?
38 kHz
What is the frequency of the second harmonic if the fundamental frequency is 1000 Hertz?
If the first harmonic of 1 kHz is 2 kHz, then the second harmonic is the odd order harmonic of 3 kHz.
What is the frequency of simple IR Transmitter?
40 kHz
What is disadvantage in amplitude modulation with carrier?
The differeces between frequency and amplitude modulation does not effect the range. Fundamentally the amplitude modulation system is less efficient in that a carrier is generated, which is modulated. The modulation power is half of the carrier power. The bandwidth required is twice the highest modulating fequency. Because of the small bandwidth required, the Amplitude Modulated band on radios is from 550 Khz to 1500 Khz. Channels are separated by 10 Khz, with actual users usually separated by 2 or three channels minimum. Frequency modulation varys the frequency of the carrier by the audio modulating component. While the frequency deviation can be as low as the audio frequency modulating the carrier, better noise performance is achieved by deviating the carrier by as much as possible. In commercial broadcast operations, the 15 Khz audio signal deviated the carrier by 75 Khz. This presents exceptionally good audio reproduction. It also causes the FM (Frequency Modulated) signal to occupy a band of about 240 Khz for a 15 Khz audio channel. This compares to 30 Khz for an equivalent AM (Amplitude modulated) signal. Because of the larger bandwidth required, the FM broadcast band is moved higher in frequency. This makes the other comments about range etc come into effect. AM signals can be received even when an interfering signal is present. Weak signals can be received in the presence of strong signals. Because of this property, Aviation signals, (Airplane to control tower and tower to plane) are in AM. FM signals have an effect called "capture effect" in which a stronger signal will capture the channel and eliminate interference from the weaker signal. Basically you are trading bandwidth for interference rejection. Because of this, signals from satellites, where the signal strength is extremenly small, used to be sent in FM. Present technology uses digital broadcast techniques. Talking about digital, because of the ability of digital receivers to process signals of extremely small size, digital signals are being sent along with both AM and FM broadcast signals for either better quality, or supplementary services. Cell phones are all being switched over to digital technology for better reliability and better channel usage.
What is the range of audio frequency?
The range humans can hear is about 20 - 20,000 Hz (20 Hz to 20 kHz); the range is smaller for older people.
Meaning of term Audio?
http://en.wikipedia.org/wiki/Audio Audio simply means sound, anything you can hear. The average frequency range of human hearing is from 20 Hz to 20 kHz.
What is the range of frequency human can hear?
2 Hz to 20 KHz .
What is the frequency of AKG C520L Wireless Headset Microphone ?
Frequency range is from60 Hz to 20 kHz.
What is the radio frequency range?
freq range of rf is 3hz (extremely low frequency) to 300Ghz (extremely high frequency)
What is the correct terms when describing the frequency range of 3 kHz to 300 GHz?
Electromagnetic Frequency (EMF) & Radio Frequency (RF)
What is the correct term when describing the frequency range of 3 kHz to 300 GHz?
Electromagnetic Frequency (EMF) & Radio Frequency (RF)
What is the correct term when describing the frequency range 3 khz to 300 ghz?
Electromagnetic Frequency (EMF) & Radio Frequency (RF)
Is 400 kHz Low Frequency?
In relation to a/c mains electricity, or to audio frequencies, 400 kHz is very high. In relation to radio waves it is fairly low.
The range of EMF on the electromagnetic spectrum extends in frequency from 0 kHz to?
300 GHz
What frequency does radio waves use?
Radio frequency (RF) is a rate of oscillation in the range of about 30 kHz to 300 GHz
The number of cycles per second is called?
Frequency, which is measured in Hertz (Hz)
