Modern smartphones like the Xiaomi 11T are equipped with advanced sound processing systems that allow you to enjoy crystal clear audio even in the noisiest places. However, many users often get confused in settings, not understanding the difference between active noise cancellation in headphones and software suppression of microphone noise during a conversation.
In this article, we will discuss how to activate and configure the noise reduction systems on your gadget. You will learn about the hidden features of MIUI that will help improve the quality of calls and music listening. We will look at both standard system tools and additional tools for professional audio streaming.
It’s worth noting that the Xiaomi 11T doesn’t have built-in Active Noise Reduction (ANC) at the hardware level of the body itself, as it does in flagship headphones. All the magic comes from software algorithms and proper pairing with external acoustics. Understanding this nuance will save you time and nerves when searching for non-existent switches.
Differences between ANC and microphone noise suppression
The first step to sound quality is to clearly distinguish between the two core technologies: Active Noise Cancellation (ANC) is a technology that physically quenches external sound waves so you can hear only music, and works exclusively with compatible headphones that have their own microphones and processors.
The second type is microphone noise suppression, which is built directly into Xiaomi 11T software and processes your voice during phone calls or recording a voice recorder, and it analyzes the background hum and cuts it off, leaving only the timbre of your speech.
⚠️ Attention: Inclusion ANC If you don't have a Bluetooth settings menu, your headphones don't support this feature, or it's activated by a button on the device itself.
It's important to understand that the algorithms for these systems are radically different, and if ANC requires hardware phase synchronization of sound waves, microphone noise cancellation uses digital frequency filtering techniques, and Xiaomi 11T uses a chipset and software filters for the MIUI shell.
Users often look for a universal noise reduction button in the general audio settings, but it's not there. Each of these features lives in its own context: one in the menu of Bluetooth devices, the other in the parameters of calls or voice recorders, and separating these concepts will help you find the right controls faster.
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ANC works only with external headphones, and microphone noise reduction is a function of the smartphone itself to improve the quality of the interlocutor’s voice.
Set up active noise reduction (ANC) for headphones
If you use wireless headphones that are compatible with the Xiaomi ecosystem, the customization process is as simple as possible. Many models, such as Mi True Wireless Earbuds or Redmi Buds, have native shell integration. First, make sure the headphones are paired and connected to the smartphone.
Go to the Settings menu and select the Bluetooth section. Find your headphones in the list of connected devices and click on the gear icon or arrow to the right of the name. This is where the specific settings for a particular headset model are hidden.
☑️ Verification of support ANC
In the menu that opens, you can see "Noise Reduction" or "Transparency Mode," and the switch allows you to choose between being completely isolated from the outside world and being in a mode where the surrounding sounds pass through the music, which is especially convenient when crossing the street or talking to a cashier in a store.
- 🎧 Noise reduction mode – completely disables external sounds for maximum immersion.
- 🔊 Transparency mode – lets voices and signals of transport without removing headphones.
- 🔇 Off mode - standard mode of operation without additional sound processing.
- 🌪️ Adaptive mode – automatically switches depending on the level of ambient noise.
For third-party headphones outside the Xiaomi ecosystem, control is often done by touching the touchpads on the headphones themselves. Usually, this is a long-term retention of your finger on the sensor for 2-3 seconds. Check the instructions on your headset to find out the exact combination.
Some advanced users prefer to use third-party apps from Google Play, such as Material Pods or Mi Buds M8. These utilities allow you to emulate a pop-up connection window and give access to hidden equalizer and noise reduction settings even for non-original accessories.
What if the ANC is not working?
Improving Call Quality: Reducing Microphone Noise
When it comes to phone conversations, the Xiaomi 11T relies on built-in voice-cleaning algorithms. By default, the system always tries to filter out background noise, but in some situations, manual intervention or settings check is required.
In the standard Phone app, click three dots in the top corner and select Settings. Scroll down to Noise Reduction or Noise Reduction. Make sure the switch is activated. This is a basic layer of protection that cuts off the static hum.
However, there is a deeper level of customization available through the engineering menu or special codes. Enter the dialer code ##64663## to enter the engineering testing menu, where you can check the performance of each microphone separately.
| Type of microphone | Location. | Function | Status of the test |
|---|---|---|---|
| Primary (Primary) | Lower end | Vote recording | Checking is required |
| Secondary (Secondary) | Upper end | Noise suppression | Checking is required |
| Tertiary (Third) | Back panel. | Videotape | Checking is required |
| Fourth (Fourth) | Inside the hull | Systemic functions | Hidden. |
If you're talking to someone who's complaining about echoes or foreign sounds, try changing the position of the phone. Palming the bottom microphone can knock out the entire noise reduction system. Hold the device by the edges or use a headset.
Also worth paying attention to is the HD Voice or VoLTE feature, if your carrier and data plan support this technology, voice quality is significantly improved, and background noise is cut off more efficiently due to the wider bandwidth.
Using a voice recorder to record without noise
The built-in Dictator app on Xiaomi 11T has powerful tools for recording sound in noisy environments, which is relevant for students, journalists or anyone taking notes on the go. Standard recording mode already has basic filtering, but it can be enhanced.
Open the Dictophone app and click on the settings icon or select a recording script before recording. Interview or Concert mode is ideal for interviews or lectures in a noisy room. In these modes, the MIUI algorithm focuses on the sound source in front of the microphone, ignoring the side noises.
- 🎙️ General mode - standard recording with medium filtering.
- 🗣️ Interview mode: Priority for voices in the vicinity of the phone.
- 🎵 Concert mode - retains the dynamics of sound, but cuts the low-frequency hum of the crowd.
- 📝 Lecture mode – optimized for long-term recording of one speaker’s speech.
For best results, move the bottom of your smartphone closer to the sound source. Xiaomi 11T's built-in microphones are directional, and distance plays a critical role. The closer the phone is, the less work is left to the noise reduction algorithms.
If built-in capabilities aren’t enough, consider installing third-party apps like Dolby On. This app uses advanced post-processing algorithms that can work wonders by removing wind, hissing and background hum after recording.
⚠️ Warning: When using Concert mode or third-party applications with Gain amplification, be careful with loud sounds so as not to damage headphone speakers or hearing.
Secrets of Dolby Atmos and Equalizer
While Dolby Atmos primarily creates surround sound, its settings also affect noise perception. On Xiaomi 11T, this feature is built into the system audio settings. Go to Settings → Sound and Vibration → Sound Quality and Effects.
Here you'll find the Dolby Atmos switch, and when you turn it on, select Dynamic or Movie profiles, which often have more aggressive dynamic range compression, which subjectively makes quieter sounds louder and sharper noises softer.
The same menu also offers a graphical equalizer. To combat monotonous noise (such as the humming of an air conditioner or an airplane engine), you can manually reduce the low frequencies (sliders on the left), which will not completely remove the noise, but will make it less noticeable against the background of music.
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To watch videos in transport, try the profile of the "Film" in Dolby Atmos - it often suppresses sharp volume drops in commercials better than others.
Remember that using an equalizer can distort the original sound of the track. Use the presets Pop, Rock or Jazz with caution if your goal is to reduce noise fatigue, not change the timbre of the music.
Solving Sound Quality Problems
Sometimes users are faced with a situation where the noise cancellation is not working correctly: the voice becomes robotic, the music is interrupted or whistling occurs, most often the problem lies in a software failure or contamination of the microphones.
The first thing to do is check the microphone holes on the ends of the smartphone. Even a microscopic speck of dust or villi from your pocket can disrupt the noise cancellation system, as the second microphone stops reading background noise correctly for its subsequent subtraction.
If the cleaning didn't work, try resetting your network settings. Go to Settings → Connection & Sharing → Reset Wi-Fi, cellular networks and Bluetooth. This action won't delete your personal data, but will return the communication modules to factory settings, which often eliminates software conflicts.
In rare cases, the problem may be the case: some thick or improperly designed protective cases cover the microphone holes, remove the case and see if the sound quality changes when you call or record.