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Answering machine

Answering machine. By: Paniz Adiban. Introduction. In a digital answering machine, principles are used to convert a caller's message into a stream of bytes. A microcontroller digitizes the caller's voice using an analog-to-digital converter and stores it in RAM (random-access memory).

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Answering machine

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  1. Answering machine By: Paniz Adiban

  2. Introduction In a digital answering machine, principles are used to convert a caller's message into a stream of bytes. A microcontroller digitizes the caller's voice using an analog-to-digital converter and stores it in RAM (random-access memory). So let's say a caller leaves a 15-second message. That might translate into 30,000 bytes of digitized data. These bytes are stored at a specific address in RAM. To play the message back, the microcontroller reads the 30,000 bytes from RAM and plays them through a digital-to-analog converter. RAM is a memory device, so the microcontroller can erase one of the messages and easily move the other messages forward into the freed-up space. Introduction

  3. Problem Earlier people used to miss every important calls, messages or information so they looked for a solution.

  4. Solution According to "Adventures in Cybersound - Valdemar Poulsen": Valdemar Poulsen, Danish telephone engineer and inventor, best known for his Telegraphone, which he patented in 1898. It was the first practical apparatus for magnetic sound recording and reproduction. It was an ingenious apparatus for recording telephone conversations. It recorded, on a wire, the varying magnetic fields produced by a sound. The magnetized wire could then be used to play back the sound.

  5. Negative outcomes • The answering machine does not allow you to have a real conversations and ask questions. Also other people might hear your personal message. However the worst negative outcome is that you might miss an emergency call and might be too late.

  6. Extra Inventor Time line • Mr. Willy Müller invented the world's first automatic answering machine in 1935. The first answering machine was a three-foot-tall machine popular with Orthodox Jews who were forbidden to answer the phone on the Sabbath.

  7. What’s next?

  8. Sources • http://library.thinkquest.org/04oct/01649/answer_phone.htm • http://www.howstuffworks.com/question21.htm • http://inventors.about.com/od/astartinventions/a/Answering.htm

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