MP3 players
The fact that the majority of people lack free time is not surprising. Young people and people at a mature age have many hobbies, but they work a lot or spend much time for their studies and don't have enough opportunity and free time for their favourite occupations. One of the most favourite activities nowadays is listening to music. However this hobby often takes much time. In this situation the best way out is to buy an MP3 player and listen to music on your way to work. With the help of an MP3 player you can not only enjoy your favourite music or listen to the radio (if this function is available) but also divert your attention from everyday fuss.
It is sometimes much more pleasant to close your eyes and shrink into your shell, than look at other passengers in the public transport or look into the window and see sights you have already seen many times before. Besides, hum and motor roaring are also unpleasant to hear.
Despite all advantages of MP3 players, they are very harmful for one's hearing. The sound power, produced by headphones, is extremely high and can be compared to the listening to the roaring of a jet at a ten meters' distance. If a person is exposed to such a loud sound everyday, he/she risks of becoming deaf. Young people want to be stylish and listen to music. They can afford themselves to buy expensive players, but prolonged listening to music simply kills their hearing.
After a rock concert a person needs several days to restore his/her hearing abilities and in case with daily listening to music, a person simply doesn't have time for this restoration. Gradually ears become unable to perceive high frequencies.
Each kind of loud sound influences ears negatively. Loud music affects cells responsible for sound perception. This effect increases greatly if ears are attacked from headphones. This leads to poor hearing. This disease is dangerous, as it comes suddenly and is very hard to treat.