Hi guys, I'm new to the forums and hope someone can help with this. 1. The problem statement, all variables and given/known data Compare the modulation techniques used by 2 different applications, giving reasons for their use. Use data tables, diagrams and any other sources to help 2. Relevant equations None 3. The attempt at a solution I originally put the following. I am going to compare the use of frequency modulation and amplitude modulation in radio transmissions. Frequency modulation tends to be used in the transmission of music, where as amplitude modulation tends to be used for the transfer of just voice, and talk shows. Firstly, amplitude modulation has a much further range than FM due to its longer wavelength. It can get through obstacles such as buildings and hills much more easily than FM. The main reason amplitude modulation is used for talk shows, is because even though it has a low signal to noise ratio as it picks up noise from amplitude modulation, the quality is still good enough to understand voice. Amplitude modulation would not be good enough quality for music. It’s the same way that telephone calls are no where near as good quality as mp3 files. Frequency modulation is a much shorter wavelength than amplitude modulation, meaning it cannot travel as far, and struggles more than an AM signal to get through obstacles due to FM being line of sight. However, FM has a much higher signal to noise ratio, because the amplitude of the signal is not being modified, preventing it from picking up noise. This higher signal to noise ratio makes it suitable enough for transmitting music at a good quality. FM also uses both the sidebands on a signal, meaning it can transmit in stereo. I was told I need to critically compare them more, and find some information on transmission distances, bandwidths, frequencies, costs etc. If someone could point me in the right direction I'd be grateful. However, if someone has different modulation techniques they think would be easier to compare, I'd appreciate that to.