Design and processing good - unfortunately very loud and also produces low frequency hum

After unpacking I was initially surprised by the visual and tactile quality for the price.
Once the hood was hung - which is really easy - and then came the disappointment when you first turn.
The engine is very noisy and has to vibrate a low natural frequency, causing the hood begins. This leads also to a rattle of metal grease filter.
In the case of the filter can be sure that any quake, on the overall volume of the hood that will not change anything but.
My girlfriend was in the next room and said I should not try the same the highest level, which I told her that this is the lowest level.
Unfortunately failed,'ll probably still have to look at the next higher price class.