sciencedude Posted August 18, 2005 Share Posted August 18, 2005 hello people my first time here and im hoping ill be getting some help on this one. I need to know how MP3 players work...by that i mean how the sound comes to the earpiece, light for IPODS,etc....and if there are other science principles used...plz mention tht as well... thnx in advance Link to comment Share on other sites More sharing options...
5614 Posted August 18, 2005 Share Posted August 18, 2005 by that i mean how the sound comes to the earpiece The same as any other speaker or headphone... if you take apart a speaker it's easy to see what is happening. There's a magnet and an electromagnet, when both of these are turned on they repel and the magnet is pushed up, when the electromagnet it off then the magnet is pulled back down. Now we have an up/down motion. This is how sound works, something moves and makes sound waves. The electromagnet is turned on and off really quickly for different lengths of time, at different frequencies and different power to make all the different sounds you hear. All the MP3 does is make the electromagnet turn on and off in a specific way that makes sound! light for IPODS I assume the ipod uses a standard backing light thingy which is basically a special piece of paper which when light is passed through it it lights up. Link to comment Share on other sites More sharing options...
sciencedude Posted August 18, 2005 Author Share Posted August 18, 2005 The same as any other speaker or headphone... if you take apart a speaker it's easy to see what is happening. There's a magnet and an electromagnet' date=' when both of these are turned on they repel and the magnet is pushed up, when the electromagnet it off then the magnet is pulled back down. Now we have an up/down motion. This is how sound works, something moves and makes sound waves. The electromagnet is turned on and off really quickly for different lengths of time, at different frequencies and different power to make all the different sounds you hear. All the MP3 does is make the electromagnet turn on and off in a specific way that makes sound! I assume the ipod uses a standard backing light thingy which is basically a special piece of paper which when light is passed through it it lights up.[/quote'] thanks for that...but any other ppl who hav more info plz post...thanks Link to comment Share on other sites More sharing options...
5614 Posted August 18, 2005 Share Posted August 18, 2005 Watch this: http://static.howstuffworks.com/flash/speaker-working.swf (from http://electronics.howstuffworks.com/speaker.htm ) The alternate for a standard magnet/electromagnet speaker is one which uses electrostatics, see here: http://static.howstuffworks.com/gif/speaker-electrostatic.jpg (from here: http://electronics.howstuffworks.com/speaker11.htm ) This: http://electronics.howstuffworks.com/mp3-player.htm is quite useful. But what specifically are you after? Link to comment Share on other sites More sharing options...
5614 Posted August 18, 2005 Share Posted August 18, 2005 Is this for some project? Saying so might get the "we don't do your homework" response, but at least we could be more specific and help you. Tell us what you have and we can correct it, give you links and help etc. Link to comment Share on other sites More sharing options...
sciencedude Posted August 18, 2005 Author Share Posted August 18, 2005 Is this for some project? Saying so might get the "we don't do your homework" response, but at least we could be more specific and help you. Tell us what you have and we can correct it, give you links and help etc. umm...yep it is for a school project...but thats what i thought this forum was for....im searchin myself ofcourse...but any links that i havent looked over and any of you guys come across it, then you can post it.. well..this project is researching on a technology that uses science principle i.e sound,light,etc.. I've chosen to do MP3 players...and now im searching for info on how the principles are used and made in the players... Link to comment Share on other sites More sharing options...
5614 Posted August 18, 2005 Share Posted August 18, 2005 What kind of age are you? Or what level of science are you looking at? And if you say like basic, then how basic is basic... and if you say medium what exactly does that mean?!? Link to comment Share on other sites More sharing options...
sciencedude Posted August 18, 2005 Author Share Posted August 18, 2005 What kind of age are you? Or what level of science are you looking at? And if you say like basic' date=' then how basic is basic... and if you say medium what exactly does that mean?!?[/quote'] im 14...year 9 science....advanced basic...i wud reckon...btw i have to do a presentation on this..just thought i shud say that Link to comment Share on other sites More sharing options...
Klaynos Posted August 18, 2005 Share Posted August 18, 2005 The howstuff works stuff is quite good, you could also cover the decoding algarythems, and other options such as atrak or ogg vorbis, as that is computer science which is still science. And also the physics of how the storage media works, there are generally 2 types flash which is normally for the smaller capacity players (up to around 1GB): http://computer.howstuffworks.com/flash-memory.htm And hard disks for the larger players, ipods and the larger sonys and irivers: http://computer.howstuffworks.com/hard-disk.htm Link to comment Share on other sites More sharing options...
sciencedude Posted August 18, 2005 Author Share Posted August 18, 2005 thanks mate Link to comment Share on other sites More sharing options...
sciencedude Posted August 20, 2005 Author Share Posted August 20, 2005 just updating the thread incase someone hasnt noticed it... Link to comment Share on other sites More sharing options...
ybk Posted August 22, 2005 Share Posted August 22, 2005 haha, it's still yr9.. chill man Link to comment Share on other sites More sharing options...
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