Noise it to ASCII meaning that the end user

Noise ispicked up when people try and record someone’s voice and it varies whether itis for analogue or digital signal. The advantage of digital signal is that evenif noise is picked up during recording, the sound of the noise is very low inamplitude meaning that you won’t be able to hear it as much. Another advantageis that the digital signals can travel further and also can send more data thananalogue signals. Also as digital signals use binary, it can be used to convertit to ASCII meaning that the end user can understand what the code is saying.

Oneof the advantages of analogue signals is that it has the ability to describeendless amount of data. Also it is easier to process the data because you canconnect analogue components such as a microphone, to record the sound data andsend it through to the computer. However, there are disadvantages to analoguesignals, which is that they catch anything that is being recorded and thiscould be the little things that may be going on outside the building or insidethe room called noise. You can try and prevent the noise by adding a filter toyour recording device so it only picks up your voice, but it also depends onhow good your microphone is.Furthermore,data is represented electronically through bits and bytes. A bit is a binarydigit so it can be either 0 or 1. A byte is equal to 8 bits that consists of0’s and 1’s, e.g.

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00111010. On the internet data can be sound, images or text.All of the data is converted into numbers – bits and bytes. Computers can’tunderstand letters so they are converted into binary. The computer thentranslates it back from binary to an ASCII format for the user to understand.ASCII is short for American Standard Code for Information Interchange and it isused by computers to convert binary numbers to a letter in the alphabet,numbers or special characters.

There are a total of 128 characters in theEnglish language and they are all represented as numbers. For example, 01001000 = H and 0110 1001 = i. It will be much more complicated in the computerssince there will be more letters than this.

There aredifferent types of signal channels available and it includes telephones, light,high frequency (HF) radio, electrical, satellite and microwave. The most commontype of signal channel is telephone.Telephone communication is where people can communicate with each other overfrom long distances (from a house to another house) by using electrical signalconductors or radio signals. Satellitescan also be used for communication. A satellite is located in space and itorbits the earth’s atmosphere and receives and transmits signals to locationsaround the earth.

It is used for a numerous number of things, e.g. T.V,telephone, radio, military and many more. Satellites communicate through radiowave signals and they transmit data back to earth by sending it to the antennasin earth. Another example of a signal channel is microwave signals.

This is most commonly used in mobile phones totransmit signals. Phones use microwave transmitters and receivers tocommunicate with other people with phones. The final type of signal channel Iwant to address, although there are many more examples, is high frequency (HF) radio signals.

The waves are between 3-30 MHz, whichis a high frequency and it allows for faster data communication because thewaves are shorter, so they will travel faster.