Does a single point subwoofer excite the entire Y or Z axis of a room if the parallel walls are separated on the Z axis?
To clarify; Sound that travels from a subwoofer to a hard surface gets reflected directly back to the subwoofer only if the sound hits the surface on a path where the path axis is orthogonal to the wall. The sound bounces back and forth between parallel walls and gets more energy added in sync each cycle by the subwoofer. But the subwoofer does not beam all of its energy directly on axis at the wall. The sound radiates omnidirectionally and only a very minor part of that energy is directly on axis between the walls. The sound energy that is not on axis gets reflected tangential or oblique which is a longer path than the on-axis path. This longer path gets dispersed throughout the room and its energy gets diminished each time it hits a reflecting wall. The longer path also changes the frequency of the standing wave. So the tangential or oblique standing waves energy should be quite negligible, right? And that longer path gets gradually longer as the off-axis angle increases. The longer paths do not radically shift room modes, but instead make the axial "Q" resonance lower.
If my listening position is on the axis with the subwoofer that is perpendicular to the two walls then the standing wave may be quite significant. But if my listening position is further away from that direct axis that goes thru the subwoofer and between the parallel walls, does that mean my listening position is not influence by the on axis standing wave?
(I can draw and post a diagram if the description above is not clear.)
