Smontaggio di cuffie

Exploded headphones

Names of the pieces: http://www.amazona.de/media/articles/article_images/article_4216/4_srh1440-exploded-diagram_EN_800x496.jpg

Commercial "Decibel" (inside the headphones): 
http://www.youtube.com/watch?v=3msPzn8KKxk

In the case of the earphones

Exploded earphones

View of works the earphone in the ear