For an example, a sound source such as a radio or television emitting sound at loud volume with a light source such as a bright lamp able to brighten a large room substantially/noticeably, or sunlight preferably the same amount of space brightened as the lamp. Lets say the sound source is in the center of the room. If the light does affect the sound (enhanced, not decreased), is the sound difference enough for the average human ear to notice. Compared from light to somewhat darkness. Sorry for the vague variables.![]()