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TZOFFSETTO:-0400 TZNAME:America/New_York EDT END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20310309T030000 RDATE:20311102T010000 TZOFFSETFROM:-0500 TZOFFSETTO:-0400 TZNAME:America/New_York EDT END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20320314T030000 RDATE:20321107T010000 TZOFFSETFROM:-0500 TZOFFSETTO:-0400 TZNAME:America/New_York EDT END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20330313T030000 RDATE:20331106T010000 TZOFFSETFROM:-0500 TZOFFSETTO:-0400 TZNAME:America/New_York EDT END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20340312T030000 RDATE:20341105T010000 TZOFFSETFROM:-0500 TZOFFSETTO:-0400 TZNAME:America/New_York EDT END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20350311T030000 RDATE:20351104T010000 TZOFFSETFROM:-0500 TZOFFSETTO:-0400 TZNAME:America/New_York EDT END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20360309T030000 RDATE:20361102T010000 TZOFFSETFROM:-0500 TZOFFSETTO:-0400 TZNAME:America/New_York EDT END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20370308T030000 RDATE:20371101T010000 TZOFFSETFROM:-0500 TZOFFSETTO:-0400 TZNAME:America/New_York EDT END:DAYLIGHT END:VTIMEZONE BEGIN:VEVENT UID:457e5b4d80965204605af82a0c3346d0 CATEGORIES:RuCCS Colloquia:Spring 2004 CREATED:20151203T141540 SUMMARY:Cognitive influences on spatial hearing LOCATION:Umass-Amherst\, Department of Psychology DESCRIPTION:February 24, 2004 at 1:00pm\nPsychology Room 101, Busch Campus\nDr. Rachel Keen\nUmass-Amherst, Department of Psychology\n"Cognitive influences on spa tial hearing" \n\nIn reverberant rooms a listener perceives a sound coming from its source but \nsimultaneously suppresses reflected sound or echoes. This phenomenon is \nknown as the precedence effect because the preceding (original) sound is \ngiven heavier weight than its subsequent reflections. Our research has \nexplored this perceptual process and found that listen ers are sensitive to \nthe acoustic information cotained in the reflected s ound even thogh it is \n"suppressed". Specifically, information relevant to room acoustics is \nprocessed by the listener and influences perception. Examples of relevant \nacoustic information are delay between lead and lag sounds, filtering of the \necho's spectrum, and presence vs. absence of an echo at a particular \nlocation. Listeners' expectations about ongoing inp ut can raise or lower \necho threshold. These findings suggest that the pr ecedence effect is \nstrongly affected by cognition, which constrasts with most current models of \nthe phenomenon. \n X-ALT-DESC;FMTTYPE=text/html:
February 24, 2004 at 1:00pm
Psychology Room 101, Busch Campus
< P>Dr. Rachel KeenUmass-Amherst, Department of Psychology
"Cognitive influences on spatial hearing"
In reverberant rooms a li
stener perceives a sound coming from its source but
simultaneously supp
resses reflected sound or echoes. This phenomenon is
known as the
precedence effect because the preceding (original) sound is
given heav
ier weight than its subsequent reflections. Our research has
expl
ored this perceptual process and found that listeners are sensitive to
the acoustic information cotained in the reflected sound even thogh it is <
BR>"suppressed". Specifically, information relevant to room acoustics
is
processed by the listener and influences perception. Examples of re
levant
acoustic information are delay between lead and lag sounds, filt
ering of the
echo's spectrum, and presence vs. absence of an echo at a
particular
location. Listeners' expectations about ongoing input
can raise or lower
echo threshold. These findings suggest that th
e precedence effect is
strongly affected by cognition, which constrasts
with most current models of
the phenomenon.