Environmental Noise Studies Expert Witnesses

Jorge Vizcaino, CHMM, CIH, CAC, CDPH Lead Inspector/Assessor, is a Certified Asbestos Consultant (CAC) and Certified Industrial Hygienist (CIH). He has over 26 years of experience in Industrial Hygiene Safety, Hazardous Material Assessments, Indoor Air Quality. He is an active member of the American Industrial Hygiene Association. 

Litigation Support - Jorge Vizcaino has over 23 years of experience working with the legal industry. His services are available to attorneys representing Plaintiff and Defense. Mr. Vizcaino has testified in over 30 legal cases. 

Areas of Expertise:

Background - Mr. Vizcaino is a Certified Industrial Hygienist (CIH), Certified Hazardous Materials Manager (CHMM), and California Certified Asbestos Consultant (CAC), with extensive expertise in hazardous materials, chemical exposure assessment, indoor air quality, environmental remediation, and occupational health and safety compliance. Mr. Vizcaino specializes in industrial chemical exposure assessments, crystalline silica and noise monitoring, hazardous waste characterization (TCLP, TTLC, WET), asbestos and lead abatement oversight, and emergency response for hazardous releases. He has developed and implemented site-specific health and safety plans (SSHASP), negotiated regulatory compliance actions, and provided strategic environmental guidance to senior management teams regarding operational risk and capital projects. 

In addition to his consulting work, Mr. Vizcaino has extensive experience as an expert witness in toxic tort, microbial contamination, asbestos/lead exposure, catastrophic fire, and carbon monoxide cases. He has participated in depositions, regulatory negotiations, and courtroom testimony in both plaintiff and defense matters.

SERVICES: Audio and video recording authentication, enhancement, transcription, and analysis, including body worn camera and security video recordings. Acoustic forensic analysis, including audibility of warning signals, speech - voice comparison, and gunshot - weapon recording analysis (e.g., Taser, ShotSpotter).  Audio technology and patent expert witness/consultant. Forensic musicology analysis. Forensic field recording and analysis per ANSI and recognized standards.

EXPERTISE: Consultation in over 800 audio-video and acoustic forensic cases since 1987. Expert testimony over eighty times, in U.S. Federal and State courts including the United States International Trade Commission (USITC), and courts in Canada and International arbitration panels (World Bank-ICSID).

DEGREES/MEMBERSHIPS: Ph.D. UC San Diego (Computer Audio) 1987; Fellow, Audio Engineering Society (AES); Member, Society of Forensic Engineers and Scientists (SFES), Acoustical Society of America (ASA).

Dr. Shaun Anthony Crawford, CIH, has a diverse 30+ year background in environmental health, safety and industrial hygiene consulting and litigation support, spanning government, industry, academics, residential and non-profit sectors. He holds a MSPH in Environmental Engineering / Industrial Hygiene and a Doctorate in Environmental Health Sciences with a specialization in industrial hygiene, both from the University of Alabama at Birmingham.

Dr. Crawford has held academic positions in Environmental Management, Urban Environmental Studies, and Environmental Health at three universities. He has a very successful business and litigation track record and is available for both plaintiff and defense representation.

For additional information, please consult Dr. Crawford's resume.

DNA Industrial Hygiene CSLB 773462 1A,HAZ is an occupational/environmental health & safety firm providing comprehensive industrial hygiene/environmental services. Dan Napier is the 'go to' person for help with your health & safety program. if you are a small business or one of the fortune 500's DNA has helped someone like you. whether you need a simple survey for a single issue or a complex benchmark or safety audit they have the experience and expertise to do the work. Mr. Napier provides services to the legal community. please check with him for trial assistance, forensic studies or expert witness services. he has been designated as an expert and has testified in federal and state courts.

The four PhD and registered PEs at Miller Engineering are celebrating 40 years of Professorships at three universities along with providing services to Government, Insurance, and Industry—through research, publications, presentations, and expert testimony. We have a dedicated office with a full time staff of engineers, researchers, and technical writers. The span of our collective academic and experiential expertise covers well the Mechanical, Electrical, Chemical, Agricultural, Industrial, Human Factors, Ergonomic and Safety fields of engineering. The areas listed below are from actual projects completed in our 40 years of history. 

David Smith provides advanced forensic audio services—including evidence authentication, analysis, intelligibility enhancement, forensic reports, and expert witness testimony. Backed by over three decades of extensive experience across criminal and civil litigation, he delivers objective, court-ready findings for legal professionals, corporate entities, and private clients.

Core Services: Audio Evidence Examination, Authentication & Analysis, Intelligibility & Clarity Improvement, and Expert Consultation & Testimony

Case Experience: Homicide Investigations & Violent Crime, Corporate Fraud, Sexual Harassment, Employment Discrimination, Labor Disputes, and Family Law

Clients Served: Prosecutors, Defense Counsel, Family & General Practice Attorneys, HR Departments, Insurance Companies, Security Firms, PIs, and Private Individuals

Services Include: Audio Authentication & Analysis: verification of integrity, alteration detection, and scientific authentication of digital and analog media

Audio Enhancement & Extraction: Intelligibility improvement, background noise suppression, and multiple voice separation

Forensic Transcription: Expert preparation of time-stamped forensic transcripts and correction of existing audio transcripts

Consulting & Expert Testimony: Objective expert witness testimony, forensic reports of findings, and litigation support

When You Need to Reveal the Truth of Your Audio, Contact Sound Testimony®.

Professor Christopher J. Tennant, PhD, CIH, has over 40 years of experience in the field of Environmental Health and Industrial Hygiene. He is Board Certified in the Comprehensive Practice of Industrial Hygiene. Dr. Tennant is currently President, CEO, and Principal Consultant at San Joaquin Environmental, in Fresno California, where he consults with Federal, State, County, City, various public agencies, and private industry sectors from public housing to Aerospace. His services are available in all 50 US States and the United Kingdom.

Dr. Tennant also serves as Professor Emeritus for the Department of Public Health at Fresno State University where he's taught Environment Health, Industrial Hygiene, and Occupational Health and Safety for 35 years at both undergraduate and post graduate levels.

Litigation Support - Dr. Tennant has been retained by numerous insurances companies and law firms on various Industrial Hygiene matters throughout the US, including workers compensation, property damage, personal injury, and wrongful death. He has testified as an expert witness in Federal Court, Superior Court, and Workers Compensation Appeals Board over 100 times. He's been deposed many more times. 

Areas of Expertise: