ABSTRACT
Haas effect: The effect in which the human brain assumes that a sound is coming from the direction in which it first hears it, even though subsequent sound levels also come from a different direction and may be slightly louder. This is used, for example, in live performances, where any loudspeakers, used to relay sounds from a stage, are timed to reproduce the sound after a delayed interval. The amount of delay needed varies with the difference in sound level and Table H.1 gives the approximate values.
