Communication and Electromagnetic Waves - Sound III - 3/25/18

Weekly Blog : Victor N. 8B

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Summary

Waves carry energy and also carry messages. Signals are created from transmitters which are sent to receivers to receiver and make the message. There are 2 types of signals, digital and analog. Analog signals record wavelength and the amplitude of the waves. This is to record how much the voice change and to transmit the music. Digital signals are made from analog signals that are continuous and do not terminate. They are also transmitted in digits, 0's and 1's. You can debate on which signal is better than the other. Some can argue that analog signals are better because it records the original information so it must be better. Some can argue that digital signals are better because it's easier to transmit, you can manipulate and edit easier, and there's no undo button for analog signals. In conclusion, there are 2 types of signals, digital and analog. Many argue that digital is better than analog.

SP2 - Using Models

This week, I used models to understand the topic of electromagnetic waves. I used models when we did a lab/activity worksheet the first two days with my table group. We modelled communication through electromagnetic waves. The first activity we did, we modelled digital waves. Using a slinky, we sent a message. The receiver either interpreted the code with 0's or 1's. The second activity we did, we modelled analog waves. Using a slinky, we sent a message. The receiver was trying to see the amplitude of the waves, and that was the message. In our third and fourth activity, we used both zeroes and ones as series of waves to transmit a letter. As you can see, we used models to understand the topic of communication in electromagnetic waves. 

XCC - Cause and Effect

This week, I started writing my WAC about which format I would want to record my producer to record my music on, analog or digital. I chose digital because I feel like digital is better. You can edit and manipulate the sound better digitally. When you edit music in a digital format, you can cut the background noise and fix some of the sound. You can also auto-tune the sound which makes it sound better. I feel like if you use the digital format more, producers will be more used too and rely more on it. The only problem with digital is the cost and time. As you can see, digital is more reliable because it allows you to edit, manipulate the sound better.

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