How to Choose Headphones？

1.Decide between earbuds or headphones.

Earbuds are best for people who are short on space, but still want a way to listen to their music. If you keep a very small purse and want to keep your iPod Nano and earbuds together in it, or you're a guy with limited pocket space, earbuds are probably a better choice. They're also great if you are on a limited budget, because there's a lot more to choose from and they tend to cost less.

2.Investigate the frequency range.

A wider frequency range means you can hear more from the music; large ranges such 10 Hz to 25,000 Hz will often be recommended - anything within that range will be fine.

3.Evaluate the headphones' sound isolation.

Earbuds and in-ear headphones tend to be better at sound isolation, due to the seal they provide in your ear; and the same with (huge) DJ-style headphones that create a little sealed environment around the ear.

4.Don't look for noise-canceling features unless you're willing to shell out the big bucks.

A cheap way to cancel background noise might also be to just put over-ear hearing protectors (from the hardware store) over earbuds to cancel out most ambient noise. On the other hand, if you're not overly fussy, you may find lower priced noise-cancelling earbuds or headphones have considerable benefit for reducing background noise in airplanes, cars or public transportation.

5.Look for the impedance of the headphones.

To get the best out of your headphones, you should match the impedance of the headphones to the audio equipment you are using. This is measured in ohms. In reality if you don't this usually means that you will need to turn up the volume slightly compared to a matched pair of headphones.