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Periodically turn the disc on the stereo system through speakers 5.1.

The question on how effective it is?

If you listen to the room is a one year old child is not harmful for him music?

Komrad
Depends on what disk.
As for the harm - it's hard to say, theoretically, it shouldn't, but dogs and parrots heavily stoned (howling and rushing), if you turn on 5.1.

Not only dogs ,but also mentally ill people feel very not.

You need to switch off all the effects, I included sessions with the program for 5.1 - they somehow share the spectrum at F and R - the effect was almost zero. And then everything turned off (stereo mode, not 5.1, but using all columns) and the beginning of normal to pass.
By the way, I have a cat under it sleeps normally, and almost under the column (though, I have it the noise doesn't react, practically grew up in the forge)