This is understood as the process by which the human auditory system organizes sound into perceptually meaningful elements. The term was coined by psychologist Albert Bregman. The related concept in machine perception is computational auditory scene analysis CASA , which is closely related to source separation and blind signal separation. Background Sound reaches the ear and the eardrum vibrates as a whole.
|Published (Last):||10 January 2007|
|PDF File Size:||2.79 Mb|
|ePub File Size:||5.93 Mb|
|Price:||Free* [*Free Regsitration Required]|
The laboratory, under the direction of Albert S. Al Bregman, studied the perceptual organization of sound, from to , using computers to generate the acoustic patterns that we studied. As the research progressed, we came to realize that the interesting examples of auditory organization that we were studying were actually part of a much more general process that we dubbed "auditory scene analysis" ASA.
The function of ASA was to decompose the typical mixture of sounds that we encounter in everyday life, allowing our brains to form separate mental descriptions of the individual sounds in the mixture. It turned out that this was not a simple problem and that the auditory system employed a number of methods for carrying it out. You can use the menu headings at the top of the page to find out all about our research. By exploring the menu "Auditory Lab" and its submenus, you can find out about the history of the laboratory, its facilities and findings, and the people who contributed to its success.
You can also see a list of its publications, and download many of them. Under the "ASA Theory" menu, you can find out how auditory scene analysis works. The major findings are given in fairly non-technical language, as well as some of its practical applications.
We also examine the question of whether ASA is innate by looking at research that has studied human adults using physiological methods, as well as research on human infants and on non-human animals. The section entitled "Studies to Do" gives some suggestions about research questions for which we do not yet have the answers, and some hints about how these might be studied.
They are derived from the following CD, which was packaged with a booklet of explanations: Bregman, A. Audio Compact disk. You can either listen to the separate examples from this CD and read about them individually, or else download the entire CD, all at once, as a zipped set of MP3 files 58 Mb , and the booklet in PDF format Kb.
The "Find Research" menu gives useful links.
Grosar Second, Wright and Bregman argue that the existence of a good horizontal streaming permits the addition of non-chordal tones without suffering the penalty of undue dissonance. The job of ASA is to group incoming sensory information to ayditory an accurate mental representation of the individual sounds. It may want the listener to accept the beegman roll of the drum, clash of the cymbal,and brief pulse of noise from the woodwinds as a single coherent event with its own striking emergent properties. He suggests that our perceptual faculties evolved as a means of allowing us to construct a useful representation of reality. Partials may cohere into tones while tones may constitute chimeric entites normally called chords.
Auditory scene analysis
The laboratory, under the direction of Albert S. Al Bregman, studied the perceptual organization of sound, from to , using computers to generate the acoustic patterns that we studied. As the research progressed, we came to realize that the interesting examples of auditory organization that we were studying were actually part of a much more general process that we dubbed "auditory scene analysis" ASA. The function of ASA was to decompose the typical mixture of sounds that we encounter in everyday life, allowing our brains to form separate mental descriptions of the individual sounds in the mixture.
Auditory Scene Analysis
Rhythmic masking release The phenomenon of rhythmic masking release, presented in this demonstration, is related to one called "comodulation masking release" CMR. In the latter, a pure-tone target is to be detected despite the presence of a masking sound formed of a narrow band of noise centered on the frequency of the target. This masker, called the "on-target" band, fluctuates in intensity. The target tone can be made easier to hear by adding, simultaneous to the target and the on-target noise band, a third sound, the "flanking" band, consisting of another narrow band of noise, far enough removed in frequency from the target to be outside its "critical band" the frequency range within which sounds interfere with one another. We seem to have added more masking noise and yet somehow made the target more audible.
Personal[ edit ] Bregman was born in Toronto, Ontario , Canada in His father was an office manager and his mother, a home-maker. He has one sister, who lives in Jerusalem , Israel. His wife is a retired history professor and active artist. He has three stepdaughters and two stepsons. Academic career[ edit ] Bregman received a Bachelor of Arts degree from University College of the University of Toronto , with a concentration in Philosophy ethics , in