There are many

on offer but they basicallyfall into four different categories – in-ear, earbuds,supra-aural or circumaural.

All have their different uses and are usually used inspecific instances.headphone sets

Recording studios and the like usually use the circumauralheadphones. These have those large round earpads that fitover the ears completely and cut out peripheral sounds.Real sound enthusiasts sometimes use these too.

Supra-aural headphones are the foam rubber covered headsetsthat sit on the outside of the ear and used to given freewith personal stereos or on airlines. They were the cheapand cheerful alternative in those days.

Earbuds are the headphones that are the bane of commuterslife! They sit on the outer part of the ear but does notcut out peripheral noise.

Users usually pump up the volume to compensate for this andleave fellow travelers with the incredibly irritatingoverflow of tinny sound.

These headphones can cause damage to hearing and also causedistraction when crossing roads or similar. The volume isset so high that normal everyday sounds are drowned out.

Very dangerous!