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 currently employ a staff of 24, which includes a team of highly-trained and experienced professional specialists in acoustics and vibration. We are certified as Federal and California Small Business Enterprise (SBE), as well as SBEcertified 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