How to choose noise-cancelling headphones

Noise-cancelling headphones can make a commute, a flight or an open-plan office far more bearable. They can also be expensive, and spec sheets are full of terms that are hard to compare. This guide explains how noise cancellation works, which features make a real difference day to day, and which numbers you can safely ignore.

How active noise cancellation works

Active noise cancellation (ANC) uses small microphones to pick up the sound around you. The headphones then produce a matching sound wave that is inverted — "anti-noise" — so that the two cancel each other out before they reach your ear. The technique works best on low, steady sounds such as engine rumble, air conditioning or the drone inside an aircraft cabin.

Higher-pitched and sudden sounds — voices, keyboard clicks, a baby crying — are much harder to cancel electronically. For those, the physical seal of the ear cushions or ear tips does most of the work. This is called passive isolation, and it needs no battery at all. In practice the best results come from a good fit combined with good ANC: strong noise cancellation cannot make up for a poor seal.

Over-ear or in-ear?

• Over-ear headphones surround the ear with a cushion. They usually isolate well, tend to have larger batteries and are comfortable for long sessions for many people — but they are bulkier to carry and can feel warm.
• In-ear (true wireless) earbuds seal inside the ear canal. They are small and easy to carry, and with the right tip size they can block a surprising amount of sound. Battery life per charge is shorter, although the charging case tops them up.
• On-ear headphones press on the ear rather than around it. They generally isolate the least and are the hardest to recommend for noisy environments.

If you wear glasses, note that the arms can break the seal of over-ear cushions. If you have small ear canals, check how many tip sizes are included in the box.

Fit and comfort matter more than you think

Because the seal affects both comfort and noise reduction, fit is the single most important factor. Look for:

• several ear-tip sizes for earbuds, ideally including foam tips;
• a headband with enough adjustment, and clamping force that does not hurt after an hour;
• a reasonable weight — on over-ear models, a few dozen grams make a difference on a long flight;
• replaceable ear pads, which extend the useful life of the headphones.

Whenever possible, buy from a store with a reasonable return policy so that you can check the fit yourself.

Bluetooth codecs, briefly

Wireless headphones compress audio before it is sent from your phone, and the codec decides how. Bluetooth headphones support the basic SBC codec; many also support AAC, which works well with iPhones, and some Android phones support higher-bitrate codecs such as aptX or LDAC. A codec only helps when both your phone and your headphones support it, so check compatibility rather than chasing the longest list.

Newer devices also support Bluetooth LE Audio, which introduces the LC3 codec. The Bluetooth SIG reports that listening tests found LC3 improves on SBC even at around half the bit rate, which can also save power. LE Audio adds Auracast broadcast audio, which lets one source stream to many headphones — useful for sharing audio, or for listening to public screens where it is offered. Treat LE Audio as a welcome bonus rather than a must-have until your phone and the places you visit support it.

Battery life and charging

Manufacturers usually quote battery life with ANC on and off. Compare the "ANC on" figure, because that is how you will use the headphones. Quoted figures are measured under each manufacturer's own conditions, and volume and the codec in use change real-world results.

Useful extras include fast charging (a few minutes of charging for a few hours of playback), USB-C charging, and the ability to keep listening through a cable if the battery runs out — handy on long flights.

Calls and microphones

If you take calls on your headphones, call quality deserves as much attention as music. Multiple microphones and voice noise reduction help the person on the other end hear you on a busy street. Multipoint connection — being connected to a laptop and a phone at the same time — saves you from re-pairing all day.

Specs you can mostly ignore

• Frequency response ranges such as "4 Hz–40 kHz": almost every headphone covers the range people can hear, and the number says nothing about how the headphones actually sound.
• Driver size on its own: a larger driver is not automatically better.
• "Up to" noise reduction percentages without a stated method: they cannot be compared across brands.

A quick checklist

1. Over-ear for long flights and the strongest isolation; earbuds for portability.
2. A comfortable fit and a good seal come first, ANC strength second.
3. Check codec support on your phone, not just on the headphones.
4. Compare battery life with ANC switched on.
5. If you take calls, look for good microphones and multipoint.
6. Prefer replaceable ear pads and a store with an easy return policy.

Picks to start your search

If you would like a shortlist, these models line up with the checklist above — from a budget over-ear set to the flagships. Our noise-cancelling headphone picks explain who each one suits and add AirPods Pro 3 for iPhone users.

As our catalog grows, RightDeals will compare offers for these models from several stores and show RightScore, which weighs value, specifications and offer data — never commissions. Until then, the links above take you to Amazon, where you can check the current price.