Hugh Robjohns wrote:The actual sound sources!
The phantom image is entirely a construct of our human sense of hearing being fooled by sounds arriving at both ears at the same time and amplitude. In real life, that can only happen if the sound is being emitted by a source on the median plane, so our brain invents a phantom image.
The sound waves from the two speakers will interact, of course, and produce a horizontal interference pattern, but there will be multiple peaks and troughs occuring at different angles for different frequencies -- not a single central lobe!
This does raise another issue regarding microphones and actual sound sources, and it’s relationship to mic placement.
Microphone placement is often spoken of like some sort of black art, a talent you have or you don’t have.
I used to think that if it sounds good where you’re standing, then that’s where the microphones should go, as the mic’s should pick up what I’m hearing.
I don’t think I’ve ever met an engineer that would agree with me, and the results are far from consistent.