The Art & Science of Audio & Video

Haas Effect; (Precedence Effect)

The Haas effect, first discovered in 1946 and named after Helmut Haas, also commonly referred to as the Precedence Effect and/or law of the first wave front. The Haas effect is a psychoacoustic effect having to do with the auditory phenomena that allows us to localize sounds emanating from anywhere around us. This is achieved by using a combination of sensory responses to the varying physical differences between the sounds we hear such as arrival times, level of intensity and phase interactions. Our use of varying arrival times to determine location is a result of simple anatomy. The geometry of the human head with our ears spaced apart and a barrier in between means that direct sound will arrive at the ear closest to the source first and then arrive at the ear furthest away allowing us to locate the source of the sound. Continue reading

July 6, 2008 Posted by | Class: E=MC2(+/-3db) | , , , , , , , , , | Leave a comment