|AREAS OF PROFESSIONAL COMPETENCE:
- Audio Tape Authentication.
- Voice Identification and Acoustic Identification.
- Transcription Analysis.
- Bilingual in English and Spanish
B.S. 1959: MIT, Electrical Engineering.
M.S. 1959: MIT, Electrical Engineering.
1971- : Forensic Consultant and Expert Witness.
1986-1990: Consultant to SRI International.
1963-1986: Senior Research Engineer, SRI International.
1962-1963: Research Engineer, Hughes Aircraft Company.
1961-1962: Research Engineer, Space Technology Laboratories.
1959-1961: Instructor, Purdue University.
1958-1959: Research Assistant, MIT.
Since 1971, Mr. Poza has served as a consultant to the law enforcement
and legal community in matters of speech science and audio tape analysis.
He has testified over 70 times in state and federal courts on such matters
as voice identification, acoustic identification, tape authentication and
transcription analysis. In 1976 he was appointed technical consultant to
the National Academy of Sciences Committee on Evaluation of Sound Spectrograms.
This committee was commissioned by the FBI to evaluate the state of the
art of speaker identification techniques. Mr. Poza was involved in every
phase of the two year study which, in 1979, resulted in the publication
of the monograph, "On the Theory and Practice of Voice Identification."
Following his 23 years as a research scientist at SRI International, Mr.
Poza continued to serve that organization as a consultant in speech science.
Mr. Poza also provides his expertise to GW Instruments of Sommerville, Massachusetts,
as a Speech Science consultant for their line of speech software products.
In 1993, Mr. Poza co-authored a 600-page treatise detailing the technical
and legal nature of forensic audio recordings, as well as the practice of
forensic audio experts. Appearing in Volume 48 of Lawyers Cooperative Publishing's
Am Jur Trials, this work represents the most comprehensive, in-depth, and
authoritative review of this subject matter ever undertaken. In 1995, Mr.
Poza co-authored a related 200 page treatment of Voicegram ("Voiceprint")
Identification. This article, which was released in Volume 54 of Lawyers
Cooperative Publishing's Am Jur Trials, provides an equally in-depth, comprehensive,
and authoritative analysis of forensic Speaker Identification.
REPRESENTATIVE RESEARCH AT SRI INTERNATIONAL:
Speaker-Independent Continuous Speech Recognition. Designed
word spotting algorithms. Designed spectral pre-processing and analysis
system to extract robust features.
Semi-automatic Speaker Identification System. Designed interactive computer
system for forensic speaker identification.
Investigation of Forensic "Voiceprint" Identification. In cooperation
with San Francisco Bay Area law enforcement organizations, examined numerous
tape recordings involved in criminal cases. Provided consultation with regard
to voice identification and tape recording methodology.
Telephone Communication System for the Deaf. Designed speech recognition
system combining the use of commercial devices and robust phonemic class
Study of Human Sensitivity to Noise. Designed software system and exper-iments
to determine the effects of environmental noises on human subjects.
Speaker Verification Research. Carried out feasibility study for a commercial
low-bit speaker verification system based on formant tracking.
- Institute of Electrical and Electronic Engineers (IEEE).
- Audio Engineering Society (AES).
PUBLICATIONS AND REPORTS:
Gruber, J. S. and Poza, F., 1995: "Voicegram Identification
Evidence" 54 Am Jur Trials, Lawyers Cooperative Publishing.
Gruber, J. S., Poza, F. and Pellicano, A. J., 1993: "Audio Recordings:
Evidence, Experts and Technology," 48 Am Jur Trials, Lawyers Cooperative
Bernstein, J., Becker, R., Murveit, H., Poza, F. and Stevens, G. 1983: "An
Approach to Telephone Communication Between Deaf and Hearing Persons."
Meeting of the Acoustical Society of America (A) (February).
Bell, D. W., Poza, F., Bernstein, J. and Murveit, H., 1983: "An Approach
to Telecommunications for the Deaf Using Speech to Text and Text to Speech
Conversions. " Voice Data Entry Systems Application Conference '83
Poza, F. and Bell, D. W., 1982: "Immediate vs. Time-Distributed Collection
of Speech Patterns," Voice Data Entry Systems Application Conference
Poza, F., Bell, D. W. and Hecker, M. H. L., 1982: "Discrimination Between
Stroke Patients and Normal Speakers III, Arbitrary Linguistic Content, Spanish
Language and Signal Degradation." Final Report, SRI Project 7323 (August).
Kryter, K. D., and Poza, F., 1980: "Effects of Noise on Some Autonomic
System Activities," Journal of the Acoustical Society of America, Vol.
67, No. 6 (June).
Bell, D.W. and F. Poza, 1980: "Man/Machine Interaction in Voice-Encoding
Applications", Final Report - Pilot Study B: Pattern Training Techniques,
Contract BOA 104230-77-H-0006, Task Order 14S, SRI Project 6692-15, USPS
Poza, F., (Technical Consultant) 1979: "On the Theory and Practice
of Voice Identification," Monograph, National Academy of Sciences.
Bell, D. W., Poza, F. and Young, J. R., 1978: "Man/Machine Interaction
in Voice-Encoding Applications," Final Report, Contract BOA 104230-77-H-006,
Task Order 05S, SRI Project 6692-6, USPS (December).
Bell, D. W. and Poza, F., 1976: "Discrimination Between Stroke Patients
and Normal Speakers on the Basis of Speech Attributes Observed in Spectrograms."
Final Report, SRI Project 3954 (February).
Becker, R. W. and Poza, F., 1975: "Acoustic Phonetic Research in Speech
Understanding," IEEE Transactions on Acoustics, Speech, and Signal
Processing, Vol. ASSP -23 No. 5 (October).
Poza, F., 1974: "Voiceprint Identification: Its Forensic Applications,"
Proceedings of the Carnahan Conference on Crime Countermeasures (April).
Poza, F., 1973: "Comments on Voiceprint Identification," Forty-Second
Semiannual Seminar of the California Association of Criminalistics.
Becker, R. W., Clarke, F. R., Poza, F. and Young, J. R., 1972: "A Semi-Automatic
Speaker Recognition System," Final Report, Michigan Department of State
Police , SRI Grant No. NI 71-078-G (August).
Becker, R. W., Poza, F., and Kryter, K. D., 1971: "A Study of Sensitivity
to Noise," Final Report, Federal Aviation Administration, SRI Contract
No. DOT-FA69WA -2211 (June).
Becker, R. W. and Poza, F., 1968: "Natural Speech from a Computer,"
Proceedings of the Association for Computing Machinery National Conference.
Bell, C. G., Poza, F. and Stevens, K. N., 1959: "Automatic Resolution
of Speech Spectra into Elemental Spectra," Proceedings of a Seminar
on Speech Compression and Processing, Air Force Cambridge Research Center,
AFCRC-TR-59-198, Vol. I (September).