I am a newb, and have never done physics so I am wondering if ye can help me. I am conducting an experiment in which people have to distinguish between sound coming from above and sounds coming from below. Due to the nature of the task, the speakers need to be placed relatively (within 10") close to the screen. I have conducted pilot studies and people have no problem ascertaining which sound came from left or right but when it came to up or down, they reported hearing majority of sounds coming from the lower speakers. I checked the decibel reading using a decibel meter, the sounds coming from the speakers are even. I have the speakers angled towards the person so sound is not (totally!) bouncing off the table or the ceiling before they hear it. But people are still having difficulty identifying whether a sound is coming from top left speaker as opposed to bottom left and same with right hand side also. ANY HELP WOULD BE GREATLY APPRECIATED!!