Does ANC damage hearing?

No. ANC reduces the need to raise volume in noisy environments, which actually protects your hearing.

Can ANC block all noise?

No. Current ANC technology is most effective against constant, low-frequency noise. Sudden sounds and voices are harder to cancel.

Is hybrid ANC better than feedforward?

Yes. Hybrid ANC uses both external and internal mics for more accurate cancellation across a wider frequency range.

ANC Explained — How Active Noise Cancellation Works

A complete guide to understanding active noise cancellation in headphones and earbuds.

What is Active Noise Cancellation?

Active Noise Cancellation (ANC) is a technology that uses microphones to capture ambient noise and generates inverse sound waves to cancel it. The result: significantly reduced background noise for a more immersive listening experience.

How ANC Works

Feedforward ANC

External microphones on the earphone pick up ambient sound before it reaches your ear. The processor generates anti-noise to cancel it. This is the most common type in budget devices.

Feedback ANC

Internal microphones inside the ear cup measure what you actually hear and generate real-time anti-noise. This is more accurate but can cause feedback issues.

Hybrid ANC

Combines both feedforward and feedback microphones for the best cancellation. Found in premium devices like the Sony WH-1000XM5 and Apple AirPods Pro 2.

ANC Performance Levels

| Level | Reduction | Example Products | |-------|-----------|-----------------|

✓ Constant low-frequency noise (airplane engines, AC hum, traffic)
✓ Open-office chatter
✓ Public transport rumble
ANC is less effective against:
✗ Sudden high-frequency sounds (honking, shouting)
✗ Very close conversations
✗ Wind noise (without wind guard)
Our ANC Testing Methodology
At Gadgets Hub, we test ANC in standardized environments, measuring actual dB reduction across frequency ranges (20Hz-4kHz). This gives you an objective ANC score rather than relying on marketing claims.