Quick Answer: Active Noise Cancellation (ANC) is a technology that uses external microphones to capture ambient noise, then generates an inverted “anti-noise” sound wave via a digital signal processor (DSP) to cancel out unwanted sound before it reaches the listener’s ear. For B2B brands, achieving high-performance ANC (e.g., -35dB depth) requires precise microphone arrays and advanced chipsets like Bluetooth 6.0 SoCs.
The Core Mechanism: 4 Steps of ANC
ANC relies on a process called destructive interference. Here’s how it works step by step:
- Detection: External microphones pick up ambient noise (e.g., engine rumble, crowd chatter).
- Analysis: The ANC chip/DSP analyzes the noise’s frequency and amplitude in real-time.
- Generation: The system creates an inverted sound wave (anti-noise) that mirrors the external noise.
- Cancellation: The anti-noise and ambient noise collide, neutralizing each other before reaching the eardrum.
💡 Industry Benchmark Case:
To achieve effective cancellation in real-world products, hardware configuration is critical. For example, our latest Hybrid ANC Over-Ear Headphone solution utilizes a JL7018F8 chipset to process these signals rapidly, achieving an ANC depth of up to -35dB. This demonstrates how high-performance DSPs translate theory into tangible noise reduction for end-users.
Adaptive ANC vs. Standard ANC
| Feature | Standard ANC | Adaptive ANC |
|---|---|---|
| Noise Reduction Level | Fixed | Dynamically adjusts to environment |
| Power Consumption | Consistent | Optimized (reduces ANC in quiet settings) |
| Best For | Predictable environments (airplanes, offices) | Variable environments (commuting, outdoor) |
| Cost | Lower | Higher (requires more advanced algorithms) |
Why Microphone Placement Matters
High-quality ANC headsets use multiple microphones in a hybrid configuration:
- Feedforward mics (outside the ear cup): Capture external noise before it enters.
- Feedback mics (inside the ear cup): Monitor what the listener actually hears for fine-tuning.
- Voice pickup mics: Isolate the wearer’s speech for clear calls (ENC – Environmental Noise Cancellation).
The more precisely these microphones are positioned and tuned, the more effective the noise cancellation.
💡 Technical Insight for Brands:
Mic count directly correlates to call clarity and ANC stability. A robust ODM design often features a 5-mic array system: typically 2 Feedforward + 2 Feedback mics for pure ANC processing, plus 1 dedicated ENC mic for voice isolation. This configuration ensures that even in windy conditions, the DSP has enough data points to filter noise without degrading voice quality.
Chipsets: The Heart of ANC Performance
Not all ANC implementations are equal. The quality of noise cancellation depends heavily on the underlying Bluetooth audio SoC (System on Chip). Key factors include:
- Processing power: Determines how quickly the DSP can generate anti-noise (lower latency = better cancellation).
- Algorithm maturity: Some chip platforms offer more refined ANC tuning out of the box.
- Power efficiency: Critical for over-ear headphones where battery life is a key selling point.
For brands developing private-label ANC products, selecting the right chipset platform is one of the most important early decisions.
💡 Market Trend:
As of late 2025/2026, leading ODM solutions are migrating to Bluetooth 6.0 platforms (such as the JL7018F8 series). These newer chips not only support faster data transmission but also offer optimized power management, allowing headphones with 500mAh batteries to sustain up to 22 hours of playback with ANC ON or 45 hours in standard Bluetooth mode.
FAQ: Common Questions About ANC Technology
Q: Does ANC drain battery faster?
A: Yes, running the ANC DSP consumes additional power. However, modern chipsets with adaptive ANC can reduce consumption in quieter environments. With large-capacity batteries (e.g., 500mAh), premium over-ear models can still achieve 20+ hours of continuous ANC usage.
Q: What’s the difference between ANC and ENC?
A: ANC cancels noise for the listener (you hear less noise). ENC cancels noise for the person on the other end of your call (they hear your voice more clearly). Many headsets use both simultaneously via separate microphone channels.
Q: Can ANC be customized for different use cases?
A: Yes. Through firmware tuning, ANC profiles can be adjusted for specific environments (e.g., “commute mode,” “office mode”) or user preferences. This is a key area where ODM partners add value during product development.
Q: Does Bluetooth version affect ANC performance?
A: Not directly, as ANC processing happens locally on the device. However, newer Bluetooth versions (like 6.0) offer lower latency and better audio codecs, which complement the overall listening experience and ensure synchronization between audio and anti-noise waves.