i currently have a 200 liter subwoofer in a 4400 liter room. opening the door into a bigger room makes it kinda like a 6th order speaker and it sounds a lot like the winisd model i made for it. with a big spike (and a lot of wind) at 30 hertz. in the bigger room with a volume yet to be measured it gets pretty loud at the opposite corner of the door. right where it has a window. now i was wondering if i could model this as a 8th order enclosure for if the windows are open and maybe even make an extension to get other resonance frequency's. i have looked for software to model this, but didn't find anything other than hornresp which i can't seem to bet working for anything other than a horn. does any1 know what software i should use for this? or how i could use hornresp for this? thanks for reading and maybe even responding!
"Could it get loud?"- yes it could, and it could be quiet at the same frequency somewhere else in the room (s).
You could consider a room with open doors or windows as a large Helmholtz resonator, but that response is separate from the loudspeaker in the room, and the room's modal response.
Low frequency SPL (sound pressure level) of the loudspeaker in either room is frequency dependent on the loudspeaker and listening position, and each room's modal response in those positions.
Room modes are dependent on relative height/width/length dimensions, as well as volume.
Hornresp is not designed to calculate room modes.
https://amcoustics.com/articles/roommodes
Various software has been designed to calculate room modes and resonances:
https://amcoustics.com/tools/amroc-pro
https://audieum.com/modal
https://www.bobgolds.com/Mode/RoomModes.htm
As far as I can see, they are designed to calculate room modes considering rigid boundaries (concrete..), so won't model the effect of doors, windows and room interconnections.
You could consider a room with open doors or windows as a large Helmholtz resonator, but that response is separate from the loudspeaker in the room, and the room's modal response.
Low frequency SPL (sound pressure level) of the loudspeaker in either room is frequency dependent on the loudspeaker and listening position, and each room's modal response in those positions.
Room modes are dependent on relative height/width/length dimensions, as well as volume.
Hornresp is not designed to calculate room modes.
https://amcoustics.com/articles/roommodes
Various software has been designed to calculate room modes and resonances:
https://amcoustics.com/tools/amroc-pro
https://audieum.com/modal
https://www.bobgolds.com/Mode/RoomModes.htm
As far as I can see, they are designed to calculate room modes considering rigid boundaries (concrete..), so won't model the effect of doors, windows and room interconnections.
i am not looking for room modes, but for the resonance frequency my window would have if it would be considered a port in a big box. this is at least what causes the resonance frequency in my smaller room since it doesn't have that resonance frequency with the door closed. i am also maybe ever going to build a rotary subwoofer https://en.wikipedia.org/wiki/Rotary_woofer and place it in between the two rooms. it would be cool if they could become a 4th or 6th order bandpass, but that's out of the point now. i just want to see what would happen if i would use the window as a port so it would make an 8th order box. i do not want to know where in the room the bass is the loudest. i just want a winisd like model of the rooms with the door and window as port. also my room is shaped a lot like a triangle because it is under a roof. so most room calculators don't work.
Yes, your situation with the subwoofer in the different sized rooms is acting somewhat like a higher order enclosure. However, modelling it exactly as an 8th order enclosure might be difficult. Experiment with placing the subwoofer in different locations within the room. Aim for positions that minimize the 30Hz peak and create a more balanced bass response.