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What is the meaning of the term center frequency in FM broadcasting?
The intuitive picture of FM is a process of changing the frequency of the radio wave in some fashion to correspond to the information wave. That's why it's called "Frequency Modulation". So when there's no sound on the FM station, let's say, the frequency is exactly the number that shows on the radio dial ... let's say 101.7 MHz for example. But when there's information being added to the radio station's signal, such as the sound of voice or music, it's done by rapidly swinging the frequency of the signal above and below 101.7 ... something like through the range of 101.625 to 101.775 MHz. Your FM receiver knows how to read these up-and-down frequency swings, and how to use them to reconstruct sounds. The "center frequency" is the frequency of the radio signal when there's no sound added to it and it's not being wiggled up and down. It's the number on the radio dial, and it's also called the "carrier frequency".
How are sound waves and radio waves different?
Hi , In Frequency No, for you can have sound and radio waves of similar frequencies. The difference is that radio is electromagnetic whereas sound is a mechanical compression wave.
Why does a radio make a sound when a phone is near it?
its something like ggreeesh
What is meant by radio frequency interference?
Radio frequency interference (rfi) is simply either man-made or natural sources that interact with radio waves. A natural source - is the crackle you hear from your radio when there's a lightning storm between you and the transmitter. A man-made source - could be something like hearing a taxi-cab radio over a 'normal' radio program.
Why is it undesirable for a radio loudspeaker to have resonant frequencies in the audio range some cheap AM radio have this problem?
At the resonant frequency, the speaker efficiency is greater so the sound will be louder. For voice radio, a resonance near 2500 Hz might improve intelligibility. For music radio, a resonance at about 200 Hz will enhance the perceived bass from the radio. For high fidelity sound, a flat response from 20 Hz to 20000 Hz is needed. In practice only the highest quality kit comes close to this. Mostly resonance causes unpleasant colouration of the sound. You can learn a lot by playing with the graphic equaliser that ships with many computer sound cards and products like iTunes. Turn up the volume on different frequencies to see what it sounds like.
What is ultrasound?
Ultrasound is sound which has a frequency higher than that of audible sound.( like radar )ADDED: Not like radar. That uses radio waves, although sonar and radar principles are similar.
What is the sentence of the frequency?
I would very much like to see you with greater frequency. What frequency will you be on? I can switch to another radio station by adjusting the frequency of my radio receiver.
What is the meaning of the term center frequency in FM broadcasting?
The intuitive picture of FM is a process of changing the frequency of the radio wave in some fashion to correspond to the information wave. That's why it's called "Frequency Modulation". So when there's no sound on the FM station, let's say, the frequency is exactly the number that shows on the radio dial ... let's say 101.7 MHz for example. But when there's information being added to the radio station's signal, such as the sound of voice or music, it's done by rapidly swinging the frequency of the signal above and below 101.7 ... something like through the range of 101.625 to 101.775 MHz. Your FM receiver knows how to read these up-and-down frequency swings, and how to use them to reconstruct sounds. The "center frequency" is the frequency of the radio signal when there's no sound added to it and it's not being wiggled up and down. It's the number on the radio dial, and it's also called the "carrier frequency".
How does sound from a radio get to your ears?
sound gets to your ears by vibrations in the air. the radio sends the vibrations out of the speaker causing the air to vibrate, when the sound reaches the ear drum it makes it vibrate, allowing us to hear sound. Kieran Cash 15 years old :)
How are sound waves and radio waves different?
Hi , In Frequency No, for you can have sound and radio waves of similar frequencies. The difference is that radio is electromagnetic whereas sound is a mechanical compression wave.
Is it true that the transmitter of a radio station combines an electronic signal with a sound waves?
Yes, a radio transmitter converts an electronic signal (such as audio from a microphone) into radio frequency (RF) waves. These RF waves are then transmitted through antennas as electromagnetic radiation, which can be converted back into sound waves by a receiver like a radio or smartphone.
What part of the electromagnetic spectrum has the lowest frequency?
The part that we call "Extremely Low Frequency Radio Waves".
What do hertz mean?
Hertz is a unit of frequency that measures the number of cycles per second in a wave, such as sound or radio waves. It is commonly used to specify the frequency of vibrations in various systems, like electrical signals or the refresh rate of monitors.
Wave in which frequency changes to create sound?
The frequency change that creates sound is known as a sound wave. Sound waves are created when an object vibrates, causing the air particles around it to move in a wave-like pattern. The frequency of these waves determines the pitch of the sound we hear.
How communication devices work?
Sound and radio waves are different phenomena. Sound consists of pressure variations in matter, such as air or water. Sound will not travel through a vacuum. Radio waves, like visible light, infrared, ultraviolet, X-rays and gamma rays, are electromagnetic waves that do travel through a vacuum. When you turn on a radio you hear sounds because the transmitter at the radio station has converted the sound waves into electromagnetic waves, which are then encoded onto an electromagnetic wave in the radio frequency range (generally in the range of 500-1600 kHz for AM stations, or 86-107 MHz for FM stations). Radio electromagnetic waves are used because they can travel very large distances through the atmosphere without being greatly attenuated due to scattering or absorption. Your radio receives the radio waves, decodes this information, and uses a speaker to change it back into a sound wave. An animated illustration of this process is given below (mouse-over the images for animations).A sound wave is produced with a frequency of 5 Hz - 20 kHz.The sound wave is equivalent to a pressure wave traveling through the air.A microphone converts the sound wave into an electrical signal.The electrical wave traveling through the microphone wire is analogous to the original sound wave.The electrical wave is used to encode or modulate a high-frequency "carrier" radio wave. The carrier wave itself does not include any of the sound information until it has been modulated.The carrier wave can either be amplitude modulated (AM, top) by the electrical signal, or frequency modulated (FM, bottom).-ForonesThe signal is transmitted by a radio broadcast tower.Your radio contains an antenna to detect the transmitted signal, a tuner to pick out the desired frequency, a demodulator to extract the original sound wave from the transmitted signal, and an amplifier which sends the signal to the speakers. The speakers convert the electrical signal into physical vibrations (sound).
If a sound had a high amplitude and high frequency what would it sound like?
The sound would be like thunder, since thunder also has high amplitudes and frequency also. Usually at the begining of thunder you will listen cracking (krat..kat..krat .........) sound which is high frequency and high pitch. At the time when thundering is almost stop you will listen the heavy /bass sound which is very high amplitude and low frequency (goom.goom....goom...........) sound.
What is 3 -30 megahertz?
3 - 30 megahertz is a frequency range within the radio frequency spectrum, commonly used for radio broadcasting, television broadcasts, and various communication systems. It falls in the low frequency range compared to higher frequency bands like microwaves or infrared.
