Troubleshoot Samsung QLED TV Turns the Volume Up and Down Automatically

Last Update date : Oct 20. 2021

For selected 2019 - 2021 QLED TV models, they have added many new features and are equipped with a “Sound Sensor”. If the TV's volume suddenly adjusts, this is related to a new function, the Sound Sensor. You can activate or deactivate the feature if you want to.


Information Icon Please Note: The information on this page is for Australian products only. Models, sequences or settings will vary depending on location and/or where the product had been purchased. To be redirected to your local support page please click here.

What is the sound sensor for?

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+.


  • Operating Status of Sound Sensor
operated status of Sound Sensor

Active voice Ampifier / Adaptive Sound+ (in Menu)

Switch left

(at the bottom of the TV)

Sound Sensor



Will be operated



Not operated



Not operated



Not operated

Method 1. Turn off the Sound Sensor switch

You can turn the sound sensor on or off on selected 2019 - 2021 QLED TVs 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.


Note: The position and shape of the sound sensor may differ depending on the model. 

Method 2. Turn off Active Voice Amplifier

On selected 2019 - 2021 Samsung TVs, Active Voice Amplifier (Adaptive Volume) 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.


  • Active voice Amplifier (in Menu) default setting is off.
  • The device screenshots and menu are only a sample in English - they are also available in the language of your country.

If you require further assistance, please consult the user manual from our Manuals & Downloads page or contact our Samsung Care Australia experts on 1300 362 603 (Toll Free in Australia). You can also contact our Chat Support team or reach us through Samsung Members Community

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