My favorite piece of technology

My favorite piece of technology are the loudspeakers or also the audio monitors. 

This object can reproduce an audio signal, and is conformated by a copper coil and a magnet. 

To create the sound, the loudspeaker oscilate with a frecuency given by the signal audio that is reproduced in a specific momment. (That is a explication so much general.)

We use it in our phones, headphones, in the listenings for the class, and in many other occasion.

The audio monitors make my life better and helps me a lot. this piece of technology is a masterpiece created by the human for a life more dinamic and more complete. This object is a discipline and helps to the audio engeenerings in many investigations. 

I recommend the use of this piece, but his use must be to a moderate volume, take care of yours ears.