From: cel@trill.berkeley.edu (Carrie Lang)
Date: Tue, 18 Apr 1995 18:37:18 +0800
Subject: Center for Speech Communication Systems Colloquium
Message-Id: <9504190137.AA22426@trill.Berkeley.EDU>
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University of California-Berkeley
Center for Speech Communication Systems Colloquium
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"Acoustic Features Differentiating Korean Medial Lax And Tense Stops"
Ji-Hye Shin
University of California at Berkeley
Monday, April 24, 1995
12:00 - 1:00 p.m.
Center for Speech Communication Systems
46 Dwinelle Hall
This talk was presented by Ji-Hye at the December meeting of the Acoustical
Society of America
Abstract
Much research has been done on the cues differentiating the three Korean
stops in word initial position. This talk focuses on a more neglected area:
the acoustic cues differentiating the medial tense and lax unaspirated stops.
Eight adult Korean native speakers, four males and four females, pronounced
sixteen minimal pairs containing these stops. The average duration of vowels
before lax stops is 31 msec longer than before their tense counterparts
(70 msec for lax vs 39 msec for tense). In addition, the average duration of
the stop closure of tense stops is 135 msec longer than that of lax stops
(69 msec for lax vs 204 msec for tense). These durational differences are
so large that they may be phonologically determined, not phonetically.
Moreover, vowel duration varies with the speaker's sex. Female speakers
have 5 msec shorter vowel duration before both stops. The quality of
voicing, tense or lax, is also a cue to these two stop types, as it is in
initial position, but the relative duration of these stops appears to be
a much more important cue. The duration of stops changes the stop perception
while that of preceding vowels does not. The consequences of these results
for the phonological description of Korean as well as the synthesis and
automatic recognition of Korean will be discussed.
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From: malcolm@interval.com (Malcolm Slaney)
Date: Tue, 18 Apr 1995 07:31:28 -0800
Subject: Scott Foster at CCRMA
Message-Id: <abb9869c0002100432a5@[199.170.108.19]>
We are returning to the subject of binaural hearing at the CCRMA Hearing
Seminar. The next three talks are all concerned with various aspects of
the binaural system.
This week, Scott Foster of Crystal River Engineering will be at CCRMA to
discuss his work in synthesizing binaural cues. Scott has been in this
business longer than anybody else I know and his company makes the
Convolvotron, the king of the binaural synthesis tools. The Convolvotron
allows multiple objects to be placed anywhere in acuostic space and to
automatically move with the listener's head. More recently, CRE has
introduced less expensive hardware for synthesis, and tools to automate the
collection of head-related transfer functions (HRTFs).
Scott will be at CCRMA to discuss their current thinking on binaural
synthesis and to discuss the current research problems.
Who: Scott Foster (President of Crystal River Engineering)
What: An update on Binaural Synthesis
When: Thursday April 20th at 11AM
Where: CCRMA Library (Top Floor of the Knoll)
In the following weeks, we have two more binaural talks scheduled, no
seminar due to ICASSP, then two special visitors talking about their work.
4/20 Scott Foster (scott@cre.com) Update Binaural Synthesis - Crystal River
4/27 Ben Bonham (UCB) Alternatives to Axonal-delays in Localization Models
5/4 Durand Begault (NASA) Binaural Intelligibility and Virtual Acoustics
5/11 No Seminar (ICASSP)
5/17** Unto Laine (Helsinki) Auditory Frequency Scales and Representations
5/19** Tomohiro Nakatani (NTT) Computational Auditory Scene Analysis
Come to CCRMA to find out more about binaural hearing!
-- Malcolm