Question about Intex Krystal Clear sand filter system

It is relatively quiet. If, as in our case, an adapter from 32 to 38 mm is used, the air is drawn in when the hose is not completely full, which makes it louder for a short time - you can hear the water being drawn in.

I was pleasantly surprised at how quiet the pump is. However, a dull hum can be heard.

Unfortunately, no value is given anywhere, but I was able to see from research that the pump is only loud when you are standing or sitting directly next to it. But I'll be happy to add it to the community, maybe a user can help you :)