1959
Development of the improved version of the DRT (DRT-IV) by Voiers and
Sharpley at TRACOR, Inc., Austin, TX
 |
1974 Incorporation of
Dynastat
|
1975 Development of the
Paired Acceptability Rating Method (PARM) under
contract to Defense Communications Agency (DCA). This was the first measure
used extensively by the DOD for assessing speech quality of communication
systems. In addition surveyed over 100 operational communication personnel
to establish relationship between the PARM scores from listening panels and
acceptability ratings from users.
|
1976 Evaluation of the State-of-the-art in speech coding algorithms for
intelligibility and quality for the Defense Communication Agency.
|
1977 Development of the
Diagnostic Acceptability Measure (DAM) for
measuring speech quality. In addition to reporting an overall score of
acceptability also provides the effect of specific signal and background
degradations on quality.
|
1978 Development of the
Diagnostic Communicability Test (DCT) for
the Navy. Recognized need to measure the effectiveness of two-way
communications.
|
1979 Evaluation of laboratory and speech coder conditions to establish
relationship between subjective and objective measures under contract to
Georgia Tech.
|
1981 Development of the
Diagnostic Alliteration Test (DALT). The
DALT is a final consonant rhyming word test that is structured the same as
the DRT.
|
1982
Development of the Diagnostic Discrimination Test (DDT). The DDT is
designed to distinguish between coding and decoding defects or deficiencies
in voice coding systems.
|
1985 Implementation of the
Spelling Alphabet Test (SpAT) using ICAO
vocabulary for the Navy.
|
1987 16KB Coder and 2.4KB Coder Evaluations for
Department of Defense (DRT and DAM).
|
1988 4.8KB Coder Evaluations for
Department of Defense (DRT and DAM).
|
1989 Refinement and Validation of
DAM-IIB under Department of Defense sponsorship.
|
1991-93
Further refinement of the DAM; development of the current version (DAM-IIC).
Development of the Diagnostic Medial Consonant Test (DMCT).
The DMCT is a medial consonant word test that is structured the same as the
DRT and DALT. Further refinements of the DAM. Development of the
"Modified" Modified Rhyme Test (MMRT) to permit systematic
experimental variation of contextual information and communication
competency. Development begun on Operational Communicability Test
(OCT) for predicting intelligibility and user-acceptance in specific
communications environments.
|
1994
Development of a new version (DRT-V) of the DRT, which has additional
scoring options and increased resolving power. Development begun on a
practical test of the effects of communication devices and links on
speaker-recognizability.
|
1995
SBIR Phase I awarded titled "The Development of Auditory Icons for
Representation of Virtual Objects in 3-D Space."
|
1996
Comprehensive evaluation of 2400 bps for new Department of Defense standard
for the Digital Voice Processor Consortium. SBIR Phase I award titled
"Development of a Method for Evaluating and Predicting Speaker
Recognizability in Voice Communications Systems."
|
1997
SBIR Phase II award to continue work on speaker recognizability.
| | | | | | | | | | | | | | | | |
