Do room acoustics influence sound that leaks to neighbors?

[Rubberducky]

In a hypothectical case, say you have a room that has certain room acoustics. Will the sound spectrum that leaks to your neighbors be impact by the room? If there is a resonance at 60 Hz, for example, would the sound on the other side of the wall have this same peak?

Or is the sound that leaks completely independent of the room, and only defined by the sound that leaves the speaker and the thickness / material of the wall?

 

[DVDdoug]

If there is a resonance at 60 Hz, for example, would the sound on the other side of the wall have this same peak?

Yes, and (as you probably know) bass goes-through walls better than mid & high frequencies.

If you have bass traps or EQ to tame be bass, it will be better on both sides.

The main thing for "soundproofing" is dense walls and isolation (with the walls on both sides screwed/nailed to a separate set of studs, etc.) and if you want to go all-out and make a studio, also isolated floors & ceilings and sometimes "a room within a room", and all of the air leaks sealed. Soundproofing is construction & architecture, not "treatment".

 

[bachatero]

room modes (resonances) occur due to the walls literally flexing, just like you can see in the classic science demo of a singer/speaker shattering a wine glass. that means you will be able to hear resonances on the other side because on that other side, despite there potentially not existing another resonance, the wall can act like a speaker due to its flexing. or, at least, that's what should happen in theory.

Yes, and (as you probably know) bass goes-through walls better than mid & high frequencies.

although this is true, wouldn't resonances just exacerbate this?