AirPods 4 have noise cancellation, but it works differently than the Pro model

Yes, AirPods 4 include active noise cancellation (ANC), which means they use microphones and software to detect outside sound and cancel it out. However, the version in AirPods 4 is less powerful than what you get in AirPods Pro. Apple calls it "adaptive audio" — it reduces background noise like traffic or a coffee shop hum, but it does not block sound as completely as the Pro version does.

The difference matters if you are choosing between models. AirPods 4 will quiet a noisy environment enough that you can hear your music or call clearly. They will not make a loud airplane cabin feel silent the way AirPods Pro do. If you spend time in very loud spaces and need maximum isolation, AirPods Pro are the better choice. If you want noise cancellation for everyday use — commuting, working in an office, taking calls at home — AirPods 4 handle that well.

Key Takeaways

  • AirPods 4 have active noise cancellation that reduces background noise, but it is less aggressive than AirPods Pro.
  • The feature works by using built-in microphones to detect and cancel out low-frequency sounds like traffic and air conditioning.
  • You turn noise cancellation on or off through your device's Control Center or by using Siri.
  • AirPods 4 also include Transparency mode, which lets outside sound in so you can hear your surroundings without removing the earbuds.

How active noise cancellation works in AirPods 4

Active noise cancellation works by listening to the world around you and creating an opposite sound wave to cancel it out. AirPods 4 have two microphones per earbud — one pointing outward to pick up external noise and one pointing inward to monitor what you are hearing. The processor inside the earbud compares these two signals and generates sound that cancels the background noise.

This process happens constantly and automatically. You do not have to do anything except turn the feature on. It works best on steady, low-frequency sounds — the rumble of a bus engine, the hum of an air conditioner, the drone of an airplane. It is less effective on sudden, high-pitched sounds like a car horn or someone shouting, because the system cannot predict and cancel those as quickly.

Turning noise cancellation on and off

To use noise cancellation on AirPods 4, open Control Center on your iPhone, iPad, or Mac and look for the audio controls. You will see three options: Active Noise Cancellation, Transparency, or Off. Tap the one you want. The setting stays active until you change it again, even if you remove the earbuds.

You can also use Siri. Say "Turn on noise cancellation" or "Switch to transparency mode" and Siri will make the change. If you use multiple Apple devices, the setting syncs across them — if you turn on noise cancellation on your iPhone, it turns on automatically when you use the same earbuds with your Mac.

Transparency mode: hearing the world without removing your earbuds

AirPods 4 also include Transparency mode, which does the opposite of noise cancellation. Instead of blocking outside sound, it amplifies it so you can hear conversations, traffic, or announcements without taking the earbuds out. The outward-facing microphone picks up sound and plays it through the speaker inside the earbud, mixed with whatever you are listening to.

This is useful when you need to stay aware of your surroundings — crossing a street, talking to someone in the room, or hearing a store announcement. You can switch between Transparency and Active Noise Cancellation when ready by tapping the audio controls in Control Center.

Battery life with noise cancellation on

Noise cancellation uses more power than regular listening because the microphones and processor are constantly working. With AirPods 4, you get about 6 hours of listening time with noise cancellation on, or up to 12 hours with it off. The charging case holds enough power for multiple charges — you can recharge the earbuds in the case and get several days of use before you need to plug the case into power.

If battery life is a concern, you can turn off noise cancellation when you do not need it. Many people use it during commutes or work and switch it off when they are home or in quiet spaces, which extends the time between charges.

AirPods 4 vs. AirPods Pro noise cancellation

The main difference is strength. AirPods Pro have a more powerful processor and additional microphones that allow for deeper noise cancellation — they can block out more sound, especially low frequencies. AirPods Pro also include adaptive audio, which automatically adjusts the level of noise cancellation based on your environment. If you move from a quiet room to a noisy street, adaptive audio increases the cancellation without you having to change the setting.

AirPods 4 do not have adaptive audio. You set them to Active Noise Cancellation or Transparency and they stay that way. For most people in everyday situations, this is not a problem. But if you move between very different environments throughout the day, AirPods Pro offer more convenience. AirPods Pro also cost more — they are roughly $100 more expensive than AirPods 4.

Frequently Asked Questions

Do I need to charge AirPods 4 more often if I use noise cancellation?

Yes, noise cancellation drains the battery faster. With it on, you get about 6 hours per charge. With it off, you get up to 12 hours. If you use noise cancellation all day, you will need to charge the earbuds in their case more frequently.

Does noise cancellation work on phone calls?

Yes. When you are on a call, noise cancellation reduces background noise so the person on the other end hears you more clearly. The outward microphone picks up your voice while the inward microphone filters out room noise before it gets transmitted.

Can I use noise cancellation with one earbud?

Yes. Noise cancellation works on whichever earbud you are wearing, whether that is one or both. If you remove one earbud, the remaining one continues to cancel noise.

Will noise cancellation work in a very loud place like a concert?

No. Noise cancellation is designed for moderate background noise, not extreme volume. At a concert or loud event, the system cannot cancel sound effectively enough to protect your hearing or make listening comfortable.