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Haas Effect: What It Is and How It's Used - Produce Like A Pro

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The Haas effect is a psychoacoustic phenomenon discovered by Dr. Helmut Haas in 1949. Also known as the “precedence effect,” the law states that when one sound is followed by another with a delay time of approximately 40 ms or less (below humans’ echo threshold), the two are perceived as a single sound. This relates to how we determine spatial location by sound. Because two noises with a very short delay between them are perceived as one, spatial location is determined by the first heard, dominant sound–regardless of where the second came. To summarize, we determine the source of a sound based on what arrives at our ears first. Any subsequent reflections or noises arriving after a short delay give the sense of depth and spaciousness and do not appear to be individual sounds. If you’re looking for interesting tricks to add to your mixing arsenal, something to experiment with is taking advantage of the Haas effect. As we’ve noted above, very short delay times that make up the Haas effect

The Haas effect is a psychoacoustic phenomenon discovered by Dr. Helmut Haas in 1949. Also known as the “precedence effect,” the law states that when one sound is followed by another with a delay time of approximately 40 ms or less (below humans’ echo threshold), the two are perceived as a single sound. This relates to how we determine spatial location by sound. Because two noises with a very short delay between them are perceived as one, spatial location is determined by the first heard, dominant sound–regardless of where the second came. To summarize, we determine the

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