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Acoustics - Vibrations Expert Witnesses

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Jonathan Broyles
Sr. Forensic Examiner
P.O. Box 490
Parker (Denver Metro Area) CO 80138
phone: 303-805-5301
fax: 303-841-7386
Areas of Expertise:
  • Audio, Video and Voice Recordings
  • Voice Identification/Comparison/Elimination
  • Surveillance/Time Lapse Video Processing
  • Authentication, Enhancement, Restoration
  • Noise Reduction/Removal
  • Video Frame/Field Capture and Printing
  • Signal Recovery, Restoration and Clarification
  • Magnetic Microscopy and Imaging Services
  • Media Repair and Cleaning Services
  • Recording Equipment Analysis and Testing
  • Recording Equipment Restoration
  • Playback Speed Correction
  • Media Repair and Cleaning Services
  • Many Tape and Digital Formats Supported
  • Related Litigation Support
  • Dictaphone Restoration and Transfer Services
  • We specialize in Recorded Evidence Analysis, Enhancement and Restoration Services of Video, Audio, Sound, Voice, Surveillance and Time Lapse Recordings; both digital and analog; through the use of custom and professional analysis systems.

     We provide qualified expert witness services to assist litigation support, public defenders, law enforcement, attorneys, government, and the general public.

    Our goal is to help you get the most from your recorded evidence.   Call now to get started.

    Memberships, Affiliations and Training:

    • American College of Forensic Examiners (ACFE)
    • American Board of Record Evidence (ABRE)
    • Audio Engineering Society (AES)
    • Institute of Electronics and Electrical Engineers (IEEE)
    • Law Enforcement Video and Emergency Services Video Association (LEVA)
    • New York Institute for Forensic Audio (NYIFA)
    • Society of Motion Picture and Television Engineers (SMPTE)
    • International Association of Identification Rocky Mtn Division (RMDIAI)

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    Bruce E. Koenig
    9 Kingsland Drive
    Suite 111
    Stafford VA 22556-1353
    phone: (540) 602-2706
    Bruce E. Koenig is the senior examiner and founder of BEK TEK LLC. He has been involved in the Forensic Analysis of Audio and Video Recordings on a full-time basis since 1974. Mr. Koenig & his associates conduct forensic examinations of audio, video & still images (e.g. JPEG) media to authenticate, improve voice intelligibility, identify/classify voice and non-voice signals, compare voice samples, and enhance video & images.

    Services Offered:
  • On-Site Evaluations of Acoustical Sounds and Environments
  • Prepares Transcriptions
  • Presents Expert Testimony
  • Assists Attorneys in Preparing for Cross-Examination of Opposing Experts
  • Evaluates Appropriate Recording and Analysis Equipment
  • Provides Forensic Training in Audio/Video Analysis
  • Conducts Research Regarding Forensic Applications
  • The formal procedures for the scientific authentication of audio media in investigative matters and legal proceedings have been updated as a result of the widespread conversion from analog to digital technology since the 1990s.

    A protocol is described to improve the voice intelligibility of investigative and other forensic audio recordings collected via digital recording systems, whether audio only or audio/video units.

    11/25/2008 · Digital Forensics
    Authenticity examinations of VHS (video home system) cassettes are commonly performed in forensic laboratories and can usually determine whether a submitted recording is original, continuous, and unaltered. One of the important determinations of this analysis is identifying any portions that have been recorded over

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    Dr. Durand R. Begault, PhD
    AFC Director
    130 Sutter Street, Floor 5
    San Francisco CA 94104
    phone: 415-397-0442
    fax: 415-397-0454
    Durand R. Begault received a PhD in Computer Audio from UC San Diego in 1988 and an MFA from Mills College in 1981. He has been associated with the Audio Forensic Center and Charles M. Salter Associates, Inc. since 1996 and has worked as an expert witness, legal consultant, and acoustical consultant on a variety of audio-related cases since 1988. Dr. Begault also holds a research position at NASA Ames Research Center and is an adjunct faculty member at McGill University. He is the author of several U.S. patents and is qualified as an expert witness in both Federal and State Courts. Dr. Begault has testified in over 40 cases on a variety of audio technology and forensic audio-related cases.

    Areas of Expertise:
    • Audio Technology Patent / Intellectual Property Analyses
    • Forensic Audio and Video Tape Examination / Authentication
    • Analysis of Speech, Alarms, Warning Signal Audibility
    • Voice Identification and Elimination
    • Analysis of ‘Ear Witness’ Testimony
    • Enhancement of Speech from Noisy Audio / Video Tape Recordings
    • Music Copyright Infringement and Musicological Analysis
    • Gunshots
    • Acoustical Test and Measurement - Environmental Sound
    • Noise Exposure
    • Software / Hardware Black Box Testing for Infringement
    • Videotape Image Enhancement
    • Analysis of Digital Recordings
    Please contact the Marketing Department at Charles M. Salter Associates, Inc./Audio Forensic Center for Dr. Begault’s current CV.

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    Durand R. Begault, PhD
    Written by an author with expertise in both theory and applications, 3D Sound for Virtual Reality and Multimedia provides readers an essential technical foundation in sound and virtual reality. The book covers components of spatial auditory displays; psychoacoustics of spatial hearing; what sounds are appropriate to spatialize; applications to human-machine interfaces (including virtual reality and multimedia); computer music; and room acoustics.
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    Robert Bruce
    16155 Park Row, Suite 150
    Houston TX 77084-6971
    phone: 281-492-2784
    fax: 281-492-1434
    CSTI Acoustics offers professional consulting services in acoustics and noise and vibration control to engineering firms, industrial companies, developers, architects, churches, private owners, attorneys, and government entities.

    Both graduates of MIT, Arno Bommer and Bob Bruce have been working together since the early 1980s. Projects have been performed throughout the US including Alaska and Hawaii, and in Canada, Mexico, Brazil, Trinidad, Argentina, Chile, Puerto Rico, England, Scotland, Germany, and Qatar.