Founded in 1966, Wilson Ihrig is a noise, vibration and acoustical consulting firm with offices in California (SF Bay Area and Los Angeles), Seattle and New York City. We have highly-trained and experienced professional specialists in acoustics and vibration in all four of our offices. We are certified as Federal and California Small Business Enterprise (SBE), as well as SBE certified with California transit agencies BART and LA Metro.

We have 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). Our staff maintains the highest professional standards and keeps abreast of new technological developments, governmental codes and regulations, and new applications of proven technologies.

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).

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.