I wont start arguing here, but if you want to read this :
Headphones always have been a danger to our hearing, if you listen to music with them too loudly for too long. But earbuds brought hearing loss to a whole new level because they don’t work to cancel out outside noise as well as regular headphones do. And because they fit inside your ear, they are blasting that loud music directly into your ear canal.
Earbuds enter the scene
So what kind of damage do earbuds do exactly?
The ears are delicate. When sound enters our ear, it causes the ear drum to vibrate. These vibrations then travel to the cochlea, where fluid carries them to fine hairs that stimulate auditory nerve fibers that travel to the brain and interpret the sound.
Hearing loss occurs when the hair cells inside our ears are destroyed. The damage is done when we listen to loud noises for a long time. With the invention of earbuds and portable music players that can hold lots of music and have a long battery life, more and more people are listening to loud music for hours. At what level is loud noise damaging to our hearing? Typically at 85 decibels, about the level of a hair dryer or a food processor.
Watch those decibels
Compared to traditional-style headphones that rest over the ear, earbuds can have a higher output level of sound by about 7-9 decibels. An audiologist at Wichita State University who pulled earbuds off students to find out how loud their music was discovered that most students were listening to music at 110-120 decibels, well over the recommended volume. At that level, loud noise can cause permanent hearing loss after just an hour and 15 minutes. With numbers like these, it’s no wonder that the number of teens with hearing loss has jumped 33 percent since 1994, according to a study published in The Journal of the American Medical Association.
So what to do if you want to preserve what hearing you may have left? If you are going to use earbuds, the American Auditory Society’s rule of thumb is 60/60 — to not listen for more than 60 minutes at a time at 60 percent of the maximum volume.
And here the link (source)
http://www.huffingtonpost.com/2013/10/16/headphones-bad-for-hearing_n_4100874.html--------------------------------------------------------
Anyway, if you search headphones as i said, go for
YUIN PK2