Hmmm, I guess we have different ways of thinking of things. I always figured that where you have less acuity is where you need more "hard" sound sources (actual transducers). For example: using only two speakers, you can get a fairly precise soundstage if those speakers are in front of you; I doubt if you could get that kind of result with two speakers behind you. Where ever our ability to phantom image is weaker, is where we need more speakers. Make sense?

Best,
Sanjay

Lena, It is very interesting to hear stuff like that; especially for sustained periods rather than confused momentary bursts, and outdoors no less! I guess with the right conditions it can happen even when you "know" where the source of the sound is. Heck, you could actually see where the cars were (visual cues) in relation to where you & others were hearing the sound.

Best,
Sanjay

It truly was bizarre, if a Police Officer had asked spectators ‘Which way did the car go!’ All would have said 'over there' it was that distinct and maintained. Because 'acoustics' is something I think about these days. I tried to figure out how the sound could emanate from a completely different location that way. If you were in the warehouse with the car, you heard the sound at the car. If you stepped just outside the warehouse the sound moved to a block over. The only reason for the 'bounce' I could come up with was the concrete building directly opposite the large door across the parking lot, was a one story. The building the Dyno was occurring in was concrete 2-story. I guess the sound beamed straight out the freight door hitting up against the one-story wall. Then the one-story bounced it back to the taller building the cars were in which sent the sound back the opposite direction straight over the top of the one story. Producing the effect that the car was traveling on that street one block over, where you could not see it…but heard it ‘over there’. There were no ‘echoes in a canyon’ thing going on that you might expect with this particular building setup, the sound was just ……. completely moved. Maybe a textbook case for reflective surfaces?