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1) If information was transmitted at audio frequencies, then you would actually hear the signal. This would be identical to a speaker playing a song on your stereo.
2) Audio frequencies, in the world of radio frequencies, are long wave-length, low energy signals that can't travel long distances. Again, that's why you can only hear someone's stereo from within eyesight of the system. Human ears can detect from about 3Hz up to around 20KHz (some better than others).
3) True radio frequencies start at in the 100Khz range. This is your most basic radio that uses amplitude modulation (aka AM radio). Many people today that listen to the radio listen to frequency modulated (FM) stations. The difference between AM and FM is beyond the scope of the answer to this question. Being a higher frequency, the signals have more energy and can travel farther distances than audible frequencies.
4) Audible frequencies (sounds the human ear can pick up) can only "transmit" amplitude (loudness or volume) and frequency (high or low pitch). However, higher frequencies, such as those used for radio, can carry much more information than the volume and pitch of a signal. This is a direct result of radio frequencies being harmonics (integer multiples) of audible signals. For instance, if a radio signal has a frequency 20 times higher than the audio signal it is transmitting, then that radio signal can not only carry the audio signal, it can also carry other information, such as information about the broadcast station. A radio signal can "encode" information within the signal allowing more information to be carried than just the audio signal itself.
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What is audio output frequency?
Audio output frequency is that range of frequencies that can be heard. For humans, that is generally considered to be the range of 20Hz to 20kHz.
Why RC coupled amplifier is called audio amplifier?
Because radio control relies on different frequencies. Since frequencies are involved in the process, an audio amplifier can be used to amplify alternating currents (currents that change), and it does the same job.
What is another name for audio engineering?
An audio engineer may also be referred to as an audio technologist, an audio technician, or even a sound technician. In reference to radio operators they may also be called broadcast technicians.
How can you transmit voice signal using ask modulation?
The only way is to digitize the audio signal and send it as data
Why are audio frequencies difficult to radiate?
In order to radiate and intercept energy efficiently, the physical size of the transmitting and receiving antennas must be an appreciable portion of the E & M wavelength.An electromagnetic wave at an audio-frequency ... let's say 1 KHz ... has a wavelength of( c / 1,000 ) = ( 3 x 108 / 103 ) = 3 x 105 = 300 kilometers = about 186.4 milesEven at the nominal limit of the frequency range of hearing ... say 20 KHz ... the wavelength is( 3 x 108 / 2 x 104 ) = 15 kilometers = 9.3 miles.In order to have a fighting chance of successful radio communication at audio frequencies, over reasonable distances using reasonable transmit-power, the parties at each end of the link need antennas measured in miles.There are plenty of other great reasons that we don't use radio at the physical baseband frequencies; but even of there were no others, this reason alone is a pretty potent show-stopper.
Why do not broadcast stations operate at audio frequencies?
There are at least four hundred reasons.Here are two of them:#1). If two (or 20) stations in your city all broadcast at audio frequencies,then you have to listen to them all at the same time, because you haveno way to separate them.#2). In order for an antenna ... transmitting or receiving .. to do a halfway decentjob, it has to be at least as long as 1/4 wavelength of the signal it's working with.The shortest radio signal at an audio frequency ... 20 KHz ... is about 9,320 miles long.
Why do you need a carrier wave?
In radio transmission, you could theoretically transmit radio signals at audio frequencies. However, because the wavelength of electromagnetism at audio-like frequencies is Huge and the frequency of a radio transmitter dictates the size of the antenna and the power requirement, you would need A Very Big Antenna and a Very Big Power Supply to do this. So, we've learned to transmit at higher "carrier" frequencies, modulating either the amplitude or frequency of the carrier signal with our audio and subtracting the carrier at the receiver end.
Can satellite systems transmit audio data?
Satellite systems can be used to transmit audio data
Can microwave systems transmit audio data?
Microwave systems can be used to transmit audio data
What is audio video communication?
Audio transmission is the broadcast of sound, video transmission is the broadcast of motion pictures.
Wireless microphone to transmit audio to audio amplifier how?
here is the signal flow from voice to speaker: The audio signal goes into the microphone then via radio frequencies which are received at the wireless transmitter box. This can then be plugged into a channel on a mixing desk and treated as a normal microphone input. The audio then goes out of the desk and to the amplifiers and speakers.
Why do radio stations use FM for high quality music?
FM is not used to broadcast high quality music. FM is how the broadcast is carried out on to the airwaves. The high quality sound comes from the stations transmitter, compression, and different equipment to give the audio a good, crystal clear sound. Hope this helps!
Broadcast of audio message?
radio
What is an audio frequency?
An audio frequency is a frequency, or range of frequencies, of audible sound waves.
What radio stations in the San Francisco Bay Area broadcast Michael Savage's radio show?
He is on KSTE Radio (650 AM) which says its signal reaches the San Francisco bay area. He is also online via streaming audio from a number of his affiliated stations.
What are the features of a belkin tunecast?
It has the capability to transmit audio from anything with a 3.5mm audio socket to your car stereo. You can set it to four different frequencies, has a range of 10-30 feet, and has a low battery light. http://www.amazon.co.uk/Belkin-Tunecast-Adapter-Black-iPod/dp/B000F37GOU
How many radio stations broacast the Ed Schultz program?
About 90 radio stations currently broadcast the Ed Schultz program. The number varies, however, as affiliates come and go. Ed Schultz's radio show is also broadcast by Sirius/XM satellite, on channel 127. And the radio show is available via streaming audio on the Ed Schultz website.
