Will listening to 40hz pure tone binaural beat all night cause any harm to your brain?

Is this a ridiculous question?
Where I live, I hear a low rumbling hum, especially at night time when it’s quiet. It’s not tinnitus. Other people can hear it but they have to really listen and for me it’s like the sound of a loud diesel engine idling – or propeller planes – almost like the Taos HUM I think.

It enters my ears and then vibrates, it’s not very nice.

I have found that listening to binaural beats at 40hz makes the sound disappear, (on youtube) however I have been researching how these tones affect the brain and I’ve read that you should listen to them for an hour – but here I am listening to them for 8 hours whilst I sleep.

Would this cause any harm?

Does anyone know – I can’t find anything about it online.