Why is the volume of the TV changing? | TechBook

TV viewers know the problem: when switching to other stations or during advertising, the volume of the sound is suddenly louder or quieter. In most cases, only the remote control handle helps. Actually, this would not be necessary if all stations would comply with the technical regulation EBU (European Broadcasting Union) R 128. Since 2012 there is this recommendation in Germany, which should realize a uniform volume in television. In many other countries she was already before.

With the implementation of the perceived loudness impression of the listener over the entire program flow should remain almost the same, to avoid a constant readjustment of the volume“, Explains Jrgen Ripperger of the Association of Electrical Engineering, Electronics and Information Technology (VDE) .The problem: the standardization of the sound levelof radio and television programs with the EBU R 128 is only a recommendation, therefore, not all transmitters comply with this technical set of rules.In general, the volume on the TV by the TV channel or the respective TV program largely determined.


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Unfortunately only a recommendation and no obligation for TV manufacturers

The EBU R 128 rules state that “the resulting loudness discrepancies between programs and channels are the cause of most of the viewer / listener complaints. “Therefore, standardizing the volume should solve this problem. The target value of the program loudness should be normalized to -23.0 LUFS (Loudness Unit Full Scale). A deviation should amount to a maximum of one LU (loudness unit, one LU corresponds to one dB). Especially with more difficult transmissions, such as live programs, there is room for maneuver.

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“Since the implementation of the EBU R128 is not binding and nevertheless such a conversion process requires technically complex solutions, it will probably take some time until this recommendation has been satisfactorily implemented for all consumers,” says Jrgen Ripperger. The remote control remains for spectators so well in the future the most important utensil.

This also explains another annoying phenomenon: In the commercial break, the sound is suddenly louder than before during the TV program.“The possible increase in volume, especially in the typical commercial breaks, is due to the fact that the user’s attention should be increased,” says Jrgen Ripperger. In order for the TV viewers to not only watch during the program, but also to understand everything about the advertised product, commercial breaks are broadcast particularly loud.

Unfortunately, this annoying feature is often used on the Internet. For example, if you watch a Youtube channel, you also have to endure the commercial breaks in much higher volumes.

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You can do this when the TV volume changes

“In such cases, the user only has the option of manually adjusting the volume according to his feelings,” advised Jrgen Ripperger from the VDE. More extensive you can often adjust the sound in the menu of the TV set. But for an ideal tone, it also depends on the correct placement of the TV in the room.


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Significantly, however, the sound quality is determined by the built-in speakers. The flatter the TV, the bassiermer he usually sounds. If you can not convince the quality of your device, you can connect additional sound bars or speaker systems via the external connections.

Some devices also have the “Auto Volume” setting in the Sound menu, which can also contribute to a consistent volume. If you want to buy a new TV, ask the retailer or look in the data sheet to see if this feature is available.