The common name for an electroacoustic transducer is 'speaker'. Speakers are simple devices that convert electrical signals into sound. Speakers are composed of three main parts; a magnet, coil and cone. There is a permanent magnet that is attached to the housing at the back of the speaker. Then a coil rests over the magnet and is attached to the cone. The cone is simply a rigid material that allows the coil to produce sound. When current passes through the coil a magnetic field is created. The magnetic field repels the permanent magnet and causes the coil to moved forward or backward rapidly. The vibration is amplified by the cone.


  1. Anonymous10/20/2012

    I'm curious to find out what blog platform you are using? I'm experiencing
    some minor security problems with my latest blog and I would like to find
    something more risk-free. Do you have any recommendations?
    My weblog ; yorba linda drain cleaning

  2. Anonymous10/22/2012

    I've been surfing online more than three hours today, yet I never found any interesting article like yours. It's pretty worth enough for me.
    In my view, if all website owners and bloggers made good content as you did, the internet will be a lot more useful than ever before.
    Also visit my webpage : stomach pain after eating

  3. Anonymous10/24/2012

    This is really attention-grabbing, You are an overly skilled
    blogger. I've joined your rss feed and look ahead to seeking extra of your wonderful post. Also, I have shared your website in my social networks
    Also visit my web-site :: orange county house cleaners

  4. This blog is hosted by blogger. I chose it because it is reliable and free.