Checklist

Around ear headphones

If you are thinking about buying noise-cancelling headphones, here's what to consider:

Headphone types

There are two types of noise cancelling headphones:

• Around ear (circumaural) headphones completely surround your ear, providing additional passive noise reduction. The cushioning may also help make them comfortable to wear for longer periods such as on long international flights. The downside is they're often large and bulky - which means they're a hassle to store and carry.

Over ear headphones

• Over ear (supra-aural) headphones are generally smaller and rest on your ears, rather than surrounding them. They provide more air flow around the ear, but may keep out less noise as a consequence.

It comes down to your own personal preference and how you intend to use the headphones. Around-ear models are bulkier and probably cancel more noise - but some over-ear models can still provide effective active noise cancelling without the bulk.

Features

Volume control

A volume control, preferably on the cable, can come in handy - although if you're listening to music on an MP3 player you can usually alter its volume without too much trouble.

Noise cancelling on/off control

If the batteries go flat you can still use the headphones to listen to music without the noise-cancelling function.

Detachable cable

If you just want a quiet environment to listen to nothing at all, you don't need the headphones plugged into your music. A detachable cable keeps it out of your way.

Carry case

A good hard case protects your headphones, keeps extra attachments in order and is particularly useful when travelling. A soft pouch can be easier to pack but doesn't give as much protection.