Bay Window Boomy Bass

[AudioNMe]

I have a bay window in my living room/listening room. When I stand under the bay window it is very boomy - like sticking your head in a car trunk when music is playing. When I stand on a chair to put my ears closer to the ceiling/sofit of the bay window, it is much worse. Knocking on the ceiling/sofit tells me it is hollow.

I borrowed some cotton blow in insulation cubes from Home Depot and putting them on the floor helps a lot. But it is still very bad. So I don't think just sticking in bass traps is the solution. I need to attack the source of the problem.

I could do either

1) Blow insulation into the sofit to fill the hollow cavity.
2) Cut out the ceiling of the sofit and turn it into a bass trap

Would either of these solutions eliminate the boomy bass or is the nature of bay windows such that you can never eliminate this problem?

I am deciding whether to enclose this open living room and convert it into a dedicated listening room. But if I cannot eliminate that boomy bass, it would not be worth pursing. I would have to look at building another room, possibly in the garage.

 

[amirm]

Do you hear the same boominess when you sit in your normal listening position? I ask because bass is position dependent and it is not important what it sounds like elsewhere than where you normally hear the music.

 

[AudioNMe]

It is not as boomy at the listening position but that boominess does impact what I hear at the listening position. In fact it limits where my listening position can be e..g if I move my head forward 6 inches, it is significantly worse. When I put the temporary cotton blow in insulation cubes on the floor of the bay window area it made a big difference at the listening position but it was still not enough.

If I can't eliminate the source of the problem then I won't be enclosing this space because that would make it worse.

 

[amirm]

Hopefully someone with more acoustics knowledge chimes in. For now, I would think that putting insulation behind the walls will do nothing for this problem.