Active noise canceling (ANC) headphones use microphones and speakers to generate sound waves that cancel out ambient noise. They have become extremely popular with the rise of remote work and the growing desire for focused workspaces. This guide covers everything a first-time ANC buyer needs to know.

How ANC Works

ANC works on a principle called destructive interference. A tiny microphone on the outside of the earcup picks up ambient noise. A digital signal processor instantly generates an inverted version of that noise and plays it through the speaker. The original noise and the inverted wave cancel each other out. This is most effective for low-frequency, continuous sounds like air conditioners, airplane engines, and train rumble.

Closed-Back vs. Open-Back

Closed-back headphones have sealed earcups that physically block sound in addition to the ANC. They offer the best noise reduction and are ideal for noisy environments. Open-back headphones have perforated earcups that let air pass through, making them more breathable for long wear, but their ANC performance is lower.

What to Look For

When buying ANC headphones, check noise canceling performance, sound quality, comfort, and battery life. Modern models include useful extras like transparency mode (to hear your surroundings), multi-point Bluetooth (connect to two devices at once), and companion apps with customizable EQ.

Caring for Your 耳機

Wipe the earcups with a dry cloth regularly to remove oils and dust. The lithium-ion battery will degrade after 2-3 years. If you are storing the headphones for a long period, keep the battery at about 50% charge.

ANC headphones are a valuable tool for work, travel, and study. Choose a model that fits your lifestyle and 享受 a quieter world.