Problem with sound

[cold_Fusion]

I'm having a little problem here. When I start my level, and fire, it alerts many monsters in other areas (behind doors) which shouldn't be able to hear it. I have no idea what the cause could be, since some doors do block the sound, but others don't, even though their properties are the same.

I also tried enabling the "Block Sound" checkbox on the linedef properties, but it didn't work.

Any help is appreciated...

[myk]

Some sections beyond the door could have linedefs referencing a sector the player is in.

Other than that I recall that on certain engines some monsters in isolated adjacent rooms would awaken before I even moved, but that would usually affect one monster, if any, and may have had to do with clipping glitches or differences (I think some versions of Legacy and/or ZDoom would do this.)

[Ultraviolet]

Way I heard it, sound blocking lines have to be double layered before it's a soundproof wall. So put it on the walls of both rooms.

[cold_Fusion]

Okay, I set every impassable linedef to block sound, and there's no change when I run the level.

[peach freak]

I had this same problem again. Are you using a double sided line to separate two rooms? Monsters can hear and fire through two-sided, impassible lines even if they do have a middle texture on them. Doors are soundproof as the ceiling height is lowered to the floor height. Instead of separating two rooms with a double sided line, make a single sided impassible line for each room.