Sound energy travells through forms of waves. The frequency of sound levels is measured in Hertz and it measures the number of cycles per second. For example, FM is measured in Megahertz so an FM signal of 90.6 is the equvialant to 90,600,000 waves/seconds. Transmission is a process in FM radio. The broadcast source, in our case, the radio station, use antennas to send out the broadcast signal. On the broadcast Antenna, electrical charges up and down the antenna which then creates electromagentic waves. These waves are sent in all different directions and and then signal is recieved whether in car or at home.
The advantages with FM radio is that you can always pick up a station wherever you are in the world. The disadvantages is the fact that DAB and online radio is taking over by having more complex things such as Webcam, chat, 
Ratings etc.
Ratings etc.1.Station bundle analogue audio signals
2. [digital]
3. Signals transmitted
4. interface and muti path distortion takes places where it bounces of objects and then recieves to the reciever a little later than the main signal.
5. Car and home radio reciveves signal.
Other Platforms
Shop Radio has an advantage of able to put any content that involves any stock instore to promote whats on offer. The disadvantage is that they have to go through the process of having a Lisence.
Online has a massive advantage as it can be used 24hours a day 7 days a week and you can listen/watch whenever it pleases the audience. It can also be viewed worldwide which gives more chance of a bigger audience.
Ustream is what we will be broadcasting on. Its easily accessible, and very reliable. The only con i can think of is that for one of our shows our target audience is n older audience which may not be as accessible or they may not have the ability to do so.
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