ANC vs ENC Headphones: What Is the Difference?

Quick Answer

ANC (Active Noise Cancellation) and ENC (Environmental Noise Cancellation) are two different noise-reduction technologies built for different purposes. ANC cancels ambient sound for the listener, making music and audio cleaner. ENC filters background noise from your microphone, so the person on the other end of a call hears your voice more clearly. Knowing which one you need depends entirely on how you plan to use your headphones.

Key Takeaways 🎧

• ANC uses microphones and anti-phase sound waves to block ambient noise from reaching your ears.
• ENC uses microphone signal processing to remove background noise from your outgoing voice during calls.
• ANC is best for music listeners, commuters, and focused workers.
• ENC is best for remote workers, gamers, and frequent callers.
• Many premium headphones now include both technologies.
• ANC generally adds more to the price of a headphone than ENC alone.
• Neither technology is universally “” better” — the right choice depends on your primary use case.
• Budget headphones often advertise ENC as a selling point because it’s cheaper to implement than true ANC.

What Is ANC (Active Noise Cancellation)?

ANC, or Active Noise Cancellation, is a technology that uses built-in microphones to detect external sounds and then generates an opposing sound wave to cancel them out before they reach your ears. The result is a noticeably quieter listening experience, even in loud environments like airplanes, trains, or busy offices.

Here’s how ANC works step by step:

1. External microphones on the headphones pick up ambient sound in real time.
2. The headphone processor analyzes the sound wave pattern.
3. An equal but opposite (anti-phase) sound wave is generated instantly.
4. The two waves cancel each other out, reducing what you hear.

Types of ANC:

Type

How It Works

Best For

Feedforward ANC

Mic placed outside the ear cup

Consistent noise reduction

Feedback ANC

Mic placed inside the ear cup

Adapts to fit the ear shape

Hybrid ANC

Both mics are used together

Best overall performance

“Hybrid ANC is the gold standard in 2026 — it combines the strengths of both feedforward and feedback systems for deeper, more consistent noise reduction.”

Common mistake: Many buyers assume ANC also improves call quality. It doesn’t — ANC only affects what you hear, not what others hear from you.

For a strong example of ANC done well, see the Sony WH-CH720N Noise-Canceling Wireless Headphones review, which breaks down real-world ANC performance in detail.

What Is ENC (Environmental Noise Cancellation)?

ENC, or Environmental Noise Cancellation, is a microphone-focused technology that filters background noise from your voice signal during calls or recordings. Instead of affecting what you hear, ENC cleans up what you transmit to others.

ENC typically works through one of two methods:

• Dual-microphone beamforming: Two or more microphones work together to isolate your voice direction and suppress sounds coming from other angles.
• AI-based noise filtering: Software algorithms trained on thousands of noise profiles identify and remove non-voice sounds in real time.

What ENC removes effectively:

• Keyboard typing sounds
• Wind noise outdoors
• Traffic and crowd noise
• HVAC or fan hum
• Coffee shop chatter. See more