Why on Xiaomi became difficult to hear the interlocutor: diagnosis and correction

Suddenly reducing the volume or quality of the sound during a conversation is one of the most common and annoying problems faced by smartphone owners. When the speaker becomes inaudible on Xiaomi, it often happens at the most inopportune moment, creating awkward pauses or forcing people to ask each word, which can be caused by both a banal software glitch and a physical contamination of the dynamic module.

To make matters worse, modern Xiaomi, Redmi and POCO models have complex noise reduction systems that sometimes fail to function properly. Users may notice that the quiet sound came after a system upgrade, moisture or even after buying a new case. In this article, we will take a closer look at all possible causes, from simple settings to hardware malfunctions, and provide step-by-step instructions for restoring normal audibility.

The main software causes of quiet sound

The problem is often not hardware failure, but software conflicts or misconfigured settings of the MIUI or HyperOS operating system. The operating system may misallocate audio codec resources, especially if heavy applications are running in the background. It is also worth considering that some third-party programs to record calls or improve sound can intercept the control of the speaker, causing a drop in volume.

One common cause is a system process failure that handles phone calls, which can occur after a firmware update or beta installation fails. In such cases, standard volume sliders may work, but the maximum sound level will be artificially limited by software. Rebooting the device 80 percent of the time helps to reset temporary errors and restore the normal operation of audio drivers.

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If the sound disappeared abruptly after the system update, try clearing the cache of the Phone application through the application settings, without removing contacts and call history.

Another important aspect is the "Absolute Volume" feature in Bluetooth settings. If you use a headset or headphones, this setting can conflict with the settings of the smartphone itself, making the sound quiet even at maximum. To check, go to the developer menu or special Bluetooth settings and switch the appropriate switch.

Physical obstacles and pollution dynamics

The physical state of the speaker is the first point to check if Xiaomi is not able to hear the speaker, and the top speaker, located in a narrow slot above the screen, is clogged with earwax, dust and pile from his pockets, and over time, this plaque is compressed and turns into a dense plug that blocks the sound waves, making the sound deaf and quiet.

To diagnose, carefully examine the speaker grid in good light, preferably with a magnifying glass. If you see gray or dark plaque, cleaning is necessary. However, the use of sharp objects (needles, toothpicks) is strictly prohibited, as you can damage the membrane or push the dirt even deeper. Safe cleaning involves the use of a soft dry toothbrush or special sticky tape.

Also worth noting is safety accessories. Inappropriate security glass or thick case can block the sound channels, especially in models where the speaker is combined with a microphone or has a side arrangement. Even a minimal skew of glass after a fall can create an acoustic barrier. Remove the case and check if the volume of the conversation changes. If so, the problem is solved by replacing the accessory with a more suitable for your Xiaomi model.

⚠️ Warning: Never use a vacuum cleaner to clean the speaker! The static electricity it creates can kill sensitive electronics inside a smartphone, and the suction force can damage the membrane.

Configuring sound codecs and HD modes

Modern smartphones support VoLTE and HD Voice technology, which provide high-quality audio when calling. However, if the interlocutor on Xiaomi became difficult to hear, it is possible that the phone tries to use a high-quality codec in the area of poor reception, which leads to artifacts and loss of volume. The operator may not support the selected codec, or in your tariff this option is not activated.

To solve the problem, you can try to force the network settings to change. → SIM-maps and mobile networks → Choose yours. SIM-map → Network type. Try switching mode to "Preferred" LTE" on"3G" or"2G" during a conversation to see if the sound pattern changes, in some cases disabling the "Sound Improvement" function, or"HD Voice in the engineering menu or standard call settings helps to stabilize volume.

Equalizer settings are worth a special attention. If you've used third-party music apps or system audio settings before, there might be presets that cut frequencies important to human speech. Reset the audio settings to factory values. The path to these is usually in Settings → Sound and Vibration → Sound Effects. Make sure that the headphone-only modes are not included.

Hardware malfunctions and wear of components

If software and cleaning didn't work, the problem is probably hardware, because over time, the speaker loses its physical properties, the magnet weakens, the membrane gets stretched or deformed, and it's a natural aging process that accelerates when you're operating at maximum volume, and then you'll see a quiet sound that's going to be constant, regardless of the settings or the applications.

Another common hardware cause is oxidation of the contacts of the speaker plume, which often happens after moisture (even condensation) or a smartphone falls. Oxides create resistance, which causes the signal to the speaker to be weakened. Visually, this is difficult to determine, requires disassembling the device and inspecting the board under a microcopy. Repair in a service center usually involves replacing the module or cleaning the contacts with ultrasound.

It is important to note that in some Redmi Note or POCO models, the top speaker acts as a multimedia speaker (in a stereo pair). If you lose sound in the video, but everything is heard normally when calling (or vice versa), this may indicate a partial failure of one of the channels or a problem with the program switching of the speaker modes.

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If the phone fell or fell into the water, self-repair is dangerous - oxidation can continue for weeks, gradually disabling the motherboard.

The Impact of Third-Party Apps and Malware

Apps installed can conflict with audio system settings, especially "optimizers," "amplifiers" and call recording applications, some of which are embedded deep into the system and force the volume levels to change, and if a problem occurs after you install a particular program, try removing it and checking the result.

Malware (viruses, miners) can also overload the processor, which means that the system lacks the resources to process sound in real time, manifesting itself in the form of delays, interruptions and quiet sound. Scan the device using Google Play Protect or a reliable antivirus. It is also recommended to check the list of applications with microphone and phone permissions in the privacy settings.

⚠️ Warning: Avoid installing applications from unknown sources (APK-forum files that promise to "make the sound 3 times better." Often they not only don't work, but they also contain ad modules that slow down the system.

Resetting and extreme measures

If none of the above methods work, the radical but effective way is to reset the phone completely, by removing all user data, apps and, most importantly, configuration errors, and make sure to back up your contacts and photos before doing so.

To perform the reset, go to Settings → About Phone → Settings Reset → Erase all data. It will take a few minutes. Once turned on, the phone will be like new. If the interlocutor becomes unheard after the reset on Xiaomi, the probability of a software problem drops to a minimum, and the issue almost guaranteed requires the intervention of a service engineer.

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