AM VS FM
Have you ever wondered why the fm radio in your car has a higher sound quality when compared to the am radio?
But why the am radio has a longer range than the fm radio wave?
The following extract will cover the wave theory, wave carriers, and modulation in order to give a thorough understanding of am and fm waves and their surrounding concepts.
THE WAVE THEORY:
The wave theory states that- waves transfer energy from one point to another; however they do so without transferring matter. They consist of disturbances within the wave, which is what creates the two varying wave types- longitudinal and transverse.
A transverse wave is a wave in which the vibrations or particles of the medium travel perpendicular to the direction in which the wave is travelling.
For example: if a buoy was placed out in the middle of the ocean were multiple sets of waves occur, the buoy would only move up and down, however the sets of waves continue to move forward towards the shore; the same principle applies to sound waves, indicating the particles of the medium travel perpendicular to the direction of the wave.
Refer to figure 2 for a visual understanding.
The height of the crest from the equilibrium is known as the amplitude.
A longitudinal wave on the other hand is where the particles of the medium move in the same direction as the wave. Energy is passed along the air molecules through the lengthway vibrations of a longitudinal wave. This process continues throughout the entire wave, and t...
... middle of paper ...
....
In order to calculate the bandwith that an FM wave produces, the sum of the modulating frequency is doubled, as well as the frequency deviation.
For example, if the frequency deviation is 75kHz, and the modulating signal frequency is 15 kHz, the bandwith required to transmit the signal has to be 180kHz.
The frequency deviation refers to the maximum instantaneous difference between an FM modulated frequency and the carrier frequency.
As was stated in “AM vs FM” each type of modulation has its own pros and cons. Although AM has the ability to have more channels available within a given range, the overall sound quality is not particularly good, due to the fact that sound is stored in the amplitude part of the wave; and ofcourse this is what is being modulated. Therefore, FM radio broadcasts are overall better due to the higher quality of sound which it produces.
wave to form, the surging tide must meet an obstacle. When the ocean meets the
through space. This theory came to life when Heinrich Hertz created those waves and seven
Why should you be chosen as a staff member? I want to help the server out I believe I could stop hackers from ruining the community and I believe I could stop people from being toxic in chat and also make it a place which people could enjoy the server and enjoy playing hcf and stay on the server also I'm very good at Screensharing people so if there hacking I could find some hacks in there .minecraft even if they deleted it. I would also record every single hacker I find and put it on my youtube channel for people to see that the person was hacking, I would also record the Screenshare so if a staff wanted to see that he had some hacks in his .minecraft I could show them some proof of he/she having hacks in her folder. I also want to make the server a none toxic place so when someone joins they will stay and not leave because either a hacker has killed them or someone was being toxic to them i would look and reply to everyone's questions in chat if they need help and i will be active all the time i will respect everyone who plays on the server even if someone disrespects me i wouldn't disrespect them back i would always stay calm when dealing with these sort of situations, because two wrongs doesn't make a right i believe being a staff you have to respect everyone that plays on the server and make them enjoy there stay on the server and also doing your job
Ban: I would ban if it was their second time hacking, or cheating in some way that violates
The advanced technology that XM Radio uses is a big change from the old fashioned ways that FM and AM radio are broadcasted. XM Radio uses satellites in order to broadcast across the entire country with a clear signal. “XM satellites’ fixed orbits ensure a focused and consistent signal” (“Satellites” 2002). If the satellites need to be moved for any reason, no problems will occur with the broadcasting and ensures that the signals will not be lost (“Satellites” 2002). The ways in which were they were manufactured plays a big role in the quality of the signals that are sent to Earth. “The satellites were built by Boeing Satellite Systems, which is the world’s leading commercial manufacturer of satellites” (“Satellites” 2002). This was a smart decision by the makers of XM Radio because Boeing is such a well-respected company that it will ensure the confidence of needed consumers.
These target groups spend an extraordinary amount of time listening to radio, especially in the car, and should be extremely receptive to the XM product due to their constant need for radio entertainment and willingness to pay for it.
Physics plays an important role in the functioning of Bluetooth in terms of waves. Waves are important in Bluetooth as microwave is the wave transmitted by Bluetooth and the whole functioning of Bluetooth is dependent on the microwave transmission.
Ultrasound is sound waves that have a frequency above human audible. (Ultrasound Physics and Instrument 111). With a shorter wavelength than audible sound, these waves can be directed into a narrow beam that is used in imaging soft tissues. As with audible sound waves, ultrasound waves must have a medium in which to travel and are subject to interference. In addition, much like light rays, they can be reflected, refracted, and focused.
Traditional AM/FM Radio. Sirius’s competition also includes traditional AM/FM radio. Unlike SIRIUS radio, traditional AM/FM radio has had a well established market for its services for many years and generally offers free broadcast reception paid for by commercial advertising rather than by a subscription fee. Also, many radio stations offer information programming of a local nature, such as local news and sports, which Sirius does not offer as effectively as local radio. Some radio stations also have begun reducing the number of commercials per hour, expanding the range of music played on the air and experimenting with new formats in order to compete more directly with satellite radio services.
The vibration of the strings of a guitar causes the sound wave, but is not actually what you are hearing. The amplification of the sound wave is what is actually heard. The differences in the tension of the stings and the mass of the strings affect the pitch of the sound produced. The ends of each string are nodes, or where the wave does not travel from its initial position. The note you hear from the string is actually the first harmonic of the wave; other harmonics created when plucking a string form the undertones and overtones of a note. The waves on a guitar string are transverse waves, meaning they travel perpendicular to the original position. The waves are also standing waves, because they remain in the same position.
Analog communication employs continuous transmission of an electromagnetic wave form that varies in frequency and amplitude.
Sound is essentially a wave produced by a vibrating source. This compression and rarefaction of matter will transfer to the surrounding particles, for instance air molecules. Rhythmic variations in air pressure are therefore created which are detected by the ear and perceived as sound. The frequency of a sound wave is the number of these oscillations that passes through a given point each second. It is the compression of the medium particles that actually constitute a sound wave, and which classifies it as longitudinal. As opposed to transverse waves (eg. light waves), in which case the particles move perpendicular to the direction of the wave movement, the medium particles are moving in the same or opposite direction as the wave (Russell, D. A., 1998).
Once again, radio is currently at a crucial stance. FM radio was once the means in which someone could find out about new music artists, hear their favorite top songs, and catch up on local/world news. However, with the surge of the Internet at the turn of the century, the role of the radio starts to diminish. The Internet can now be used for gathering local news or weather in a fast and efficient manner. It can also be used as a way for music fans to find new artists similar to ones that they currently like, and (although not legal) ease in the process of downloading complete albums in high-quality formats for free. CD and MP3 players are now very popular for the person “on-the-go,” and as a result, it’s very easy to find people that remark: “I don’t listen to radio.” The reason for this is that radio has lost its niche. No longer is radio as convenient of a means to get news and experience new or popular music. Radio is forced, once again, to innovate itself in order to keep from being eliminating by the more popular types of med...