How to troubleshoot the QLED TV that turns the volume up and down automatically

Sound sensor detects the sound of the surroundings for the Active Voice Amplifier and Adaptive Sound+ functions of Intelligent Mode. These functions can be used only when the sound sensor is activated, and the sound output is set to TV Speaker. Therefore, you can make the TV stop from changing volume up and down itself by two methods: switching off the sound sensor or turning off Active Voice Amplifier and Adaptive Sound+.

• Operated Status of Sound Sensor

You can turn the sound sensor on or off by using its button at the bottom of the TV. With the TV on, you can push the button to the left to turn the sound sensor on or to the right to turn it off. 

You can see the pop-up window on the TV to check whether the sound sensor is turned on or off.

Active Voice Amplifier analyses the ambient noise and provides optimal sound depending on the noise, and Adaptive Sound+ provides optimised sound quality by analysing the viewing space and the acoustic components of the content. They are designed to improve your viewing experience by recognising your content, usage patterns, and the environment around your TV. However, if you do not want the automatic volume adjustment to be enabled, follow the steps below to turn it off.

Step 1. Navigate to Settings.

Step 2. Select General and then select Intelligent Mode Settings

Step 3. Select Intelligent Mode to turn off all the functions or select each option to turn it off.