Founded in 1966, Wilson Ihrig is a noise, vibration and acoustical consulting firm with offices in California (SF Bay Area HQ and Los Angeles), Seattle and New York City. We have highly-trained and experienced professional specialists in acoustics and vibration.

Wilson Ihrig is now part of RWDI. Our acoustics and vibration specialists are now part of a broader network of experts solving environmental and engineering challenges worldwide. Our clients will benefit from RWDI’s approach of combining acoustics, vibration, climate, and performance engineering. We’re proud of our nearly 60-year legacy and excited for what’s ahead. Rest assured that our technical team and the scope of services you rely on will remain unchanged. We are joining a team of over 800 engineers, scientists, and sustainability specialists in more than 30 offices across North America, Europe, and the Asia-Pacific region. We look forward to serving our clients with even greater capabilities.

Wilson Ihrig has experience on thousands of projects, earning us an international reputation for excellence in design, practicality, and sensitivity to clients’ needs. Consulting service areas include: transit / transportation noise & vibration, highway noise, building isolation, structure-borne noise & vibration, architectural acoustics, construction noise and vibration, expert witness, and industrial noise. Environmental services include: evaluation of noise and vibration impacts on communities, and writing the noise and vibration sections of Environmental Impact Reports and Statements (EIR/EIS).

We are equipped to perform all types of acoustical and vibration measurements, including narrow band spectrum and octave/third octave analyses, digital processing of noise and vibration data, transfer function and mobility testing, mechanical impedance testing, statistical analysis, extended noise surveys. Additional services include dynamic stress and strain measurement and evaluation, dynamic deflection tests, modal analyses, air pressure transient measurements, acoustic absorption testing, material damping measurements, and vibration isolator testing.

We are a member firm of the National Council of Acoustical Consultants (NCAC), American Council of Engineering Companies (ACEC), and American Public Transportation Association (APTA).

RWDI is a global leader in climate and performance engineering, delivering specialized expertise in wind engineering, sustainability, air quality, and environmental modeling for the built environment. For more than 50 years, they have partnered with clients to solve complex challenges on some of the world’s most iconic and ambitious projects, including supertall towers, long-span bridges, stadiums, and industrial facilities. RWDI provides comprehensive services across every project stage to enhance performance, resiliency, and efficiency while minimizing environmental impact.

Our Core Values

  • Provide responsive and reliable consulting services

  • Create and maintain a supportive environment that fosters quality work, learning, and the free exchange of ideas

  • Treat our clients and staff with dignity, fairness, and respect

  • Innovate and share our technical knowledge with our industry and professional colleagues to advance the study and application of acoustical engineering

Staff Longevity 2025 — Five Years +

We’re very proud of the fact that for many people, when they join our firm, they stay.
In a time when many employees move from place to place, a large percentage of our staff
find that Wilson Ihrig is a good fit for them and put down roots.