ANC and ENC are frequently listed together on Bluetooth earbud specification sheets, but they solve different problems. ANC is primarily designed to reduce environmental noise heard by the wearer, while ENC is commonly used in the earbuds market to describe microphone-side noise-reduction functions intended to improve outgoing voice quality during calls.
For brands, wholesalers and OEM buyers, understanding this difference is important when comparing samples, defining product specifications and communicating features accurately to customers. For more technical and B2B resources covering active noise cancellation, testing, product configuration and OEM manufacturing, explore our ANC Earbuds Guides .
ANC primarily reduces environmental noise for the person wearing the earbuds. ENC is commonly used commercially to describe microphone-side call-noise-reduction processing that helps make the user's voice clearer to the person on the other end of a call. ANC works mainly on the listening side; ENC works mainly on the outgoing voice side. A pair of earbuds can support both.
ANC vs ENC: The Difference in One View
Active Noise Cancellation
Primarily reduces environmental noise heard by the earbud wearer.
Typical purpose: improve the listening experience in environments such as transportation, offices or other locations with continuous background noise.
Call Noise Reduction
Primarily processes the microphone signal so the person receiving your call can hear your voice more clearly.
Typical purpose: improve outgoing voice quality during calls, meetings, gaming voice chat or other microphone use.
What Is ANC in Earbuds?
ANC stands for Active Noise Cancellation. It is an active audio system designed to reduce certain external sounds reaching the listener.
In a simplified ANC system, microphones detect environmental sound. The electronics and processing system use this information to create an anti-noise signal through the earbud speaker. When properly implemented and tuned, this can reduce the listener's perception of certain external noise.
ANC is generally more effective against relatively continuous low-frequency sounds than against unpredictable, rapidly changing sounds.
Examples can include:
- Air-conditioning or fan noise
- Engine or transportation rumble
- Low-frequency road noise
- Other relatively steady background sounds
For a more detailed explanation, see How Noise Cancelling Earbuds Work .
Feedforward, Feedback and Hybrid ANC
The term “ANC” alone does not describe the complete noise-cancellation architecture. Different products can use different microphone configurations.
External Microphone
A feedforward ANC design uses an external microphone to detect environmental noise before it reaches the user's ear.
The detected signal is used by the ANC processing system to generate the appropriate anti-noise response.
Internal Microphone
A feedback ANC design uses a microphone positioned on the inside/listening side of the earbud.
This allows the system to monitor the acoustic result closer to what is being delivered toward the user's ear.
External + Internal
Hybrid ANC combines external and internal microphone information.
This provides the ANC system with more information for noise detection and correction, but the final performance still depends on the complete product design and tuning.
What Is ENC in Earbuds?
In the Bluetooth earbuds market, ENC is commonly used as a commercial term for microphone-side environmental or call-noise reduction.
The purpose is different from ANC.
During a call, the microphone can capture both the user's voice and environmental sound. Depending on the product platform, microphone configuration and algorithm, the system can process the microphone signal to reduce unwanted background components and improve the outgoing voice signal.
Depending on the product, call-noise-reduction performance can be influenced by:
- Number and position of microphones
- Microphone sensitivity and consistency
- Product structure
- Chipset and available processing capability
- Noise-reduction algorithm
- Firmware and tuning
- Wind and environmental conditions
ANC vs ENC Earbuds: Key Differences
| Factor | ANC | ENC / Call Noise Reduction |
|---|---|---|
| Main Purpose | Reduce environmental noise perceived by the wearer | Reduce unwanted background noise in the outgoing microphone signal |
| Primary Side | Listening / playback side | Microphone / voice side |
| Who Mainly Benefits? | The person wearing the earbuds | The person receiving the user's voice |
| Typical Use | Music, travel, commuting and noisy environments | Phone calls, meetings, gaming voice chat and communication |
| Microphones | Used according to feedforward, feedback or hybrid ANC architecture | Used for voice pickup and environmental/noise analysis according to the product design |
| Processing | ANC algorithm and anti-noise generation | Microphone signal processing / voice noise reduction |
| Does It Reduce Noise You Hear? | Yes, this is the main purpose | No, not as its primary function |
| Does It Improve Outgoing Voice? | Not its primary purpose | Yes, this is the main purpose |
| Can Both Exist Together? | Yes. A product can support ANC and microphone-side call-noise reduction at the same time. | |
Common ANC vs ENC Misunderstandings
“ENC Means I Hear Less Background Noise”
Not in the normal Bluetooth-earbud use of the term. ENC/call-noise reduction primarily processes the microphone signal. It does not replace ANC for reducing the environmental noise heard by the wearer.
“ANC Automatically Means Clear Calls”
No. An earbud can have good listening-side ANC while its microphone performance is only average. Call performance needs to be evaluated separately.
“More Microphones Always Mean Better Performance”
Microphone count alone does not determine performance. Placement, quality, processing, firmware, acoustic structure and tuning also matter.
“A Bigger ANC dB Number Must Be Better”
An advertised ANC figure should not be evaluated in isolation. Test frequency, fixture, seal, conditions and tuning methodology can affect the reported result.
Can Earbuds Have Both ANC and ENC?
Yes. ANC and microphone-side call-noise reduction are complementary functions rather than competing technologies.
A suitable product platform can use ANC to improve the user's listening experience while also using microphone processing to improve outgoing voice during calls.
However, buyers should not assume that the presence of both terms on a specification sheet means both functions perform equally well.
Do 2-Mic, 4-Mic or 6-Mic Earbuds Perform Better?
Microphone count is useful information, but it should not be treated as a standalone quality score.
A Bluetooth earbud may use microphones for different purposes, including:
- Voice pickup
- Environmental-noise pickup
- Feedforward ANC
- Feedback ANC
- Call-noise-reduction processing
- Transparency / ambient functions
The same total microphone count can therefore represent different system architectures.
How Does the Chipset Affect ANC and ENC?
The Bluetooth/audio platform is an important part of an ANC or call-noise-reduction product because it determines which processing, microphone and firmware functions can be supported.
However, the chipset name alone does not determine the final product quality.
Real-world ANC and call performance can depend on the complete system:
Components
- Chipset
- Microphones
- Speaker driver
- Battery
Mechanical Design
- Microphone placement
- Acoustic chamber
- Ear-tip seal
- Product fit
Processing & Tuning
- ANC algorithm
- Call-noise reduction
- Firmware
- Gain / filter tuning
For this reason, Tashells recommends evaluating the actual product platform and approved sample rather than choosing a product based only on the chipset brand printed on a quotation.
What Should B2B Buyers Check Before Ordering ANC + ENC Earbuds?
Do Not Approve an ANC Earbud From the Specification Sheet Alone
Before approving a product for OEM, private-label or wholesale production, confirm the actual configuration and evaluate samples.
- ANC architecture: Is it feedforward, feedback or hybrid ANC?
- Microphone configuration: How many microphones are used and what is each one used for?
- Call performance: Test voice pickup in quiet and noisy environments.
- ANC performance: Listen in realistic continuous-noise environments instead of relying only on an advertised dB number.
- Fit and seal: Confirm that the earbud structure and ear tips provide a consistent fit.
- Transparency mode: If supported, verify mode switching and real-world usability.
- Bluetooth functions: Check pairing, reconnection, controls and connection stability.
- Battery: ANC operation consumes power, so evaluate playback under the intended operating mode.
- Production consistency: Confirm the agreed configuration before moving from approved sample to mass production.
How Should ANC and ENC Be Tested?
ANC and call-noise-reduction functions should be evaluated separately because they affect different signal paths.
Listening-Side Evaluation
Applicable checks can include:
- ANC mode activation
- Mode switching
- Left/right operation
- Transparency/ambient mode where applicable
- Basic real-world listening evaluation
- Abnormal noise or instability
Microphone-Side Evaluation
Applicable checks can include:
- Microphone operation
- Voice pickup
- Call function
- Multiple-microphone operation where applicable
- Call-noise-reduction function where applicable
- Voice behavior in different environments
For more information about our testing framework, visit the Tashells Bluetooth Earbuds Testing Lab .
ANC & ENC Earbuds Manufacturing at Tashells Audio
Tashells Audio is the Bluetooth audio manufacturing brand operated by Shenzhen iFree Electronics Ltd. Our production facility is located in Fenggang, Dongguan, Guangdong, China.
Since 2014, we have focused on Bluetooth audio product development and manufacturing for B2B projects.
ANC earbuds require additional microphones, acoustic design, noise-cancellation functions and product validation compared with basic TWS products.
Depending on the selected product platform and project requirements, ANC earbud projects can include:
- Feedforward or supported Hybrid ANC configurations
- Transparency / ambient mode where available
- Multiple-microphone configurations
- ENC / call-noise-reduction functions
- Selected battery and component options
- Acoustic adjustments where technically feasible
- Logo on earbuds and charging case
- Product and case colors
- Bluetooth device name where supported
- Custom retail packaging
- Manuals, labels and barcodes
Our typical B2B MOQ is 1,000 pieces. Actual MOQ can vary according to the selected model, components, packaging and customization requirements.
Explore our ANC Earbuds for OEM & Private Label Projects .
From Approved ANC Sample to Mass Production
For B2B manufacturing, approving the product specification is only one part of the project. The confirmed configuration also needs to remain consistent through production, applicable testing, inspection and packaging.
Confirm Specification
Confirm the selected product platform, ANC/ENC configuration, microphones, battery, branding and packaging requirements.
Evaluate Sample
Check actual listening, ANC modes, microphone/call behavior, Bluetooth functions, charging and fit before approval.
Approve Configuration
Establish the approved product configuration that the production order should follow.
Mass Production
Materials, assembly and production are coordinated according to the confirmed project requirements.
Testing & Inspection
Applicable Bluetooth, audio, microphone, ANC/ENC, charging, control and appearance checks can be incorporated according to the product and agreed requirements.
Branding & Packaging
Confirm logo, packaging, manuals, labels, barcodes, accessories and other agreed private-label elements before shipment.
See our complete Earbuds Manufacturing Process and Quality Control pages for more information.
ANC vs ENC Earbuds FAQ
What is the main difference between ANC and ENC in earbuds?
ANC primarily reduces environmental noise heard by the person wearing the earbuds. ENC is commonly used in Bluetooth-earbud specifications to describe microphone-side call-noise-reduction processing intended to reduce unwanted background noise in the outgoing voice signal.
Which is better, ANC or ENC?
They solve different problems and should not be treated as competing features. ANC is relevant when reducing environmental noise for the listener is important. ENC/call-noise reduction is relevant when outgoing voice clarity is important.
Does ENC reduce the noise I hear?
No, not as its primary function. In Bluetooth earbuds, ENC normally refers to processing of the microphone signal during calls. ANC is the technology primarily intended to reduce environmental noise heard by the wearer.
Does ANC improve microphone call quality?
ANC is primarily a listening-side function. Call quality depends on the microphone system, voice pickup, call-noise-reduction processing, product structure and tuning.
Can earbuds have both ANC and ENC?
Yes. A product can support listening-side ANC and microphone-side call-noise-reduction functions at the same time. The actual implementation depends on the selected hardware and product platform.
Is 6-mic ENC always better than 4-mic ENC?
Not necessarily. Microphone count alone does not determine performance. Microphone placement, component quality, chipset capability, processing algorithms, firmware, mechanical design and tuning all influence the final result.
Is Hybrid ANC better than feedforward ANC?
Hybrid ANC uses both external and internal microphone information, giving the system more information for noise control. However, real-world performance still depends on the complete hardware, acoustic design, fit, firmware and tuning. The architecture name alone is not a guarantee of performance.
Does Tashells manufacture ANC and ENC earbuds?
Yes. Tashells Audio supports B2B manufacturing and customization of ANC Bluetooth earbuds, including available Hybrid ANC, multiple-microphone and ENC/call-noise-reduction configurations depending on the selected product platform and project requirements.
Continue Your ANC Earbuds Research
How Noise Cancelling Earbuds Work
Learn how microphones, signal processing and anti-noise work together in active noise-cancelling earbuds.
Read ANC Guide →Hybrid ANC Earbuds: How Hybrid Noise Cancellation Works
Understand how feedforward and feedback microphones work together in Hybrid ANC earbuds and what B2B buyers should evaluate.
Read Hybrid ANC Guide →OEM ANC Earbuds: B2B Product & Manufacturing Guide
Learn how to evaluate ANC configurations, product platforms, customization options and manufacturing requirements for OEM projects.
Read OEM ANC Guide →Looking for ANC + ENC Earbuds for Your Brand?
Tell us your target market, estimated quantity, target price range, ANC requirements, microphone requirements and customization needs. Tashells Audio can evaluate suitable ANC / ENC Bluetooth earbud platforms for your B2B project.