How does music on a mp3 player make sound?

It is very complicated. Simplistically, the music is digitized, converted in to a string of digital numbers, that are stored in a memory on the device, similar to the way a CD holds a digital representation of the music on it.

The digital data, stored in the memory on the player, just as with a CD player, is read from the memory and each word is converted to a voltage. This happens perhaps 20000 times a second, and the voltage therefore is updated at that rate. The result is a reproduction of the original sound that is then sent to an amplifier and to the speaker or headphones.

The tricky part about the MP3 player is the used of digital compression / decompression via a complicated computer algorithm that is too complicated to describe here, but you can find more information by searching for MP3 on the internet. The result is that the amount of memory used is about 1/10th that is required for a CD, for example.

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Sound is caused by changes in air pressure over time.

A microphone measures the air pressure, and converts it to an voltage. A computer records the current voltage (and so the air pressure) 44100 times per second and saves this all as a file. The file could then be put on a CD, saved to the computer, or whatever.

To play back the sound, the device reads the file, and sends a new voltage 44100 times per second. The headphones (or speakers) use a magnet which changes strength depending on voltage to move a small cone to different positions. The position of the cone (closer to or further from your ear) changes the air pressure, making sound. And if the microphone and the speakers are good, the changes in pressure that are made by the speakers will be the same as the ones that went into the microphone, so the sound you hear is the same.

The catch with mp3 is that once the sound has been recorded to a file, it is "compressed" to remove things you wouldn't be able to hear. As you play songs, the mp3 player "decompresses" the mp3 files to get them back to their original state, before playing them as usual.

(44100 is an example. It is the standard because it is often enough to capture all the sounds that humans can hear, but sometimes 22050, 96000, and other numbers are used.)

I hope that helped!

i understood your doubt ,the file is with the format like mp3 and the data is in the form of 0's and 1's but how can mp3 player playing songs?. OK now look the mp3 player it has the built with the encoders and decoders when you open a file it decodes the format and transform the code into sound signals which is audible to you.example VLC media player can play the music like mp3,mp4,.vob,.mid also but while playing .3gp files it has no suitable format for the audio it only shows the vedio but not the audio.that's it if u have doubt check it. if you like answer please go through the site http://www.edlearner.co.cc/ and make some comments,subscribe.

The thing is that the data contained in the music file is read by your mp3 player, converted into electricity that pushes small magnets inside the earphone. The vibrations created are understood as sound, they create sound.

I think hahahahah

Magic.

Science?