WILSON IHRIG

What WILSON IHRIG does

Wilson Ihrig, Inc. is a specialty consulting firm delivering noise, vibration, and acoustical engineering services, founded in 1966 by George Wilson, PhD and headquartered in Emeryville, California. The firm operates from four U.S. offices — Northern California (Emeryville), Southern California (Culver City), Washington (Seattle), and New York — and was acquired by RWDI in 2024 while retaining its brand identity. Its core technical capabilities center on architectural acoustics, building isolation, rail transit noise and vibration, structural vibration analysis using Finite Element Analysis (FEA), environmental noise compliance, construction vibration monitoring, and forensic expert witness work, supported by proprietary measurement instrumentation developed in-house.

Wilson Ihrig's services span the full project lifecycle from prediction and modeling through field measurement, design, and post-construction monitoring. Technical differentiators include custom instrumentation such as a pneumatic force-calibrated 40 lb hammer, tri-axial downhole vibration measurement sondes, pavement core acoustic impedance and rail fastener dynamic stiffness test rigs, and floating-slab track bed designs pioneered by the founder in 1978. The firm serves transit authorities (LA Metro, Sound Transit, MARTA, VTA BART), healthcare and research institutions (Seattle Children's Research Institute, UCSF Sandler Neuroscience Center, Memorial Sloan-Kettering, MarinHealth Medical Center, Cornell CHESS, Stanford, NASA JPL, Lawrence Berkeley National Laboratory, Rockefeller University), and performing arts venues (Benaroya Hall, Jazz at Lincoln Center, Four Seasons Centre for the Performing Arts).

The business model is project-based professional services: consulting fees are quoted per engagement based on scope, complexity, and duration, with multi-year contracts common on transit on-call mandates. Clients are acquired through direct engagement, referrals, and technical reputation. The technical staff of fewer than 50 employees collectively holds more than 300 years of specialized experience, including INCE Board-Certified professionals and PhD researchers who have authored industry-standard TCRP, NCHRP, and ACRP reports. Revenue is not publicly disclosed, and the firm is privately held under RWDI ownership.

Name

WILSON IHRIG

Legal name

Wilson Ihrig, Inc.

Website

https://wilsonihrig.com

Company type

Private

Founded year

1966

Operating status

Operating

Headcount range

11–50 employees

Short description

Wilson Ihrig is a U.S.-based acoustics, noise, and vibration consulting firm founded in 1966, serving transit authorities, healthcare and research institutions, and performing arts venues with project-based engineering and measurement services, now part of RWDI.

Ownership category

akta.pro rank

Product category

Acoustics and Vibration Consulting

NAICS

Other Measuring and Controlling Device Manufacturing (334519), Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables (334513)

SIC

Industrial Instruments For Measurement, Display, And Control (3823)

akta.pro primary industry

Noise, Vibration & Harshness (NVH) Testing / Compliance Measurements (TLAKANAL)

akta.pro secondary industries

Non-Destructive Testing (NDT) & Advanced Inspection (Phased Array, TOFD, Guided Wave) (EUAEAKAF), Machinery, Equipment & Fixed Asset Appraisal (BPAHANAD)

Keywords

• Acoustics consulting
• Vibration consulting
• Noise control engineering
• Rail transit acoustics
• Building isolation design

Headquarters

HQ city

Emeryville

HQ country

United States

HQ region

North America

Offices4 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D

Revenue model

1. Consulting Services: Professional consulting services for acoustics, noise, and vibration control across architectural, transportation, industrial, and environmental projects. Revenue is generated through project-based fees for design, analysis, monitoring, and expert witness services.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

Wilson Ihrig is a specialized consulting firm providing acoustics, noise, and vibration engineering services across architectural, transportation, industrial, and environmental projects. Their offerings span prediction, measurement, design, and monitoring for rail transit systems, performing arts facilities, healthcare and research buildings, highways, industrial facilities, and construction activities. They also provide forensic analysis and expert witness services for noise and vibration-related disputes.

Product overview

Wilson Ihrig is an internationally renowned acoustics, noise, and vibration consulting firm founded in 1966, now part of RWDI. The company offers a comprehensive portfolio of consulting services rather than a software product platform. Core services include Architectural Acoustics, Building Isolation, Rail/Transit Consulting, Structural Vibration, Environmental Consulting, Construction Monitoring, Highway Consulting, Industrial Consulting, and Forensic/Expert Witness Services. The firm also provides specialized offerings such as Special Measurements (using custom-designed instrumentation for complex field testing) and Automated People Movers consulting. Services are delivered by technical experts with collectively more than 300 years of experience, working across architectural, transportation, and industrial sectors.

Differentiator

Problem solved

Functional benefit

Products and services

• Architectural Acoustics

Quantifiable outcome

• Building isolation designs achieve threshold of hearing for performing arts facilities adjacent to transit
• +1 more outcomes

Named customers16 records

Segments5 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

One partnership is on record.

• RWDIflagshipStrategic or Co-development PartnerWilson Ihrig is now part of RWDI, a broader network of experts solving environmental and engineering challenges worldwide. The acquisition combines Wilson Ihrig's acoustics and vibration expertise with RWDI's climate, vibration, and performance engineering capabilities. Wilson Ihrig's specialists now operate as part of RWDI's integrated service offering.

Scale indicators3 records

Recent moves5 records

Expansion highlights4 records

Direct peers

• Acentech: Acentech is a US acoustics, audiovisual, vibration, and telecommunications consulting firm with a similar service mix and comparable client base across cultural, healthcare, and higher-education projects.
• Veneklasen Associates: Veneklasen is a California-based acoustics and vibration consulting firm competing for the same architectural, transit, and industrial engagements in the West Coast market.
• Kirkegaard Associates: Kirkegaard is a US acoustics and vibration consulting firm with comparable practice areas spanning architectural acoustics, building isolation, and rail/transit noise and vibration.
• Threshold Acoustics: Threshold Acoustics is a US consulting firm focused on architectural acoustics and vibration isolation for performing arts centers, museums, and civic buildings, overlapping with Wilson Ihrig's building isolation work.
• Cerami & Associates: Cerami is an acoustics, vibration, and audiovisual consulting firm with a New York presence and a similar mix of architectural, healthcare, and transit clients.
• Longman Lindsey: Longman Lindsey is an acoustics and vibration consulting firm providing similar architectural, environmental, and transportation noise control services to architects, developers, and transit agencies.

Broad incumbents

• Buro Happold: Buro Happold is a global engineering consultancy with an acoustics practice that competes with Wilson Ihrig on large architectural and infrastructure projects where integrated engineering drives selection.
• Arup: Arup is a global engineering firm with a substantial acoustics practice, frequently competing for rail transit, building performance, and infrastructure work that overlaps with Wilson Ihrig's service lines.
• WSP: WSP is a global engineering consultancy with an acoustics and noise control practice serving transit agencies and large developers, overlapping with Wilson Ihrig's rail and environmental services.

Others

• RWDI: RWDI is the parent company of Wilson Ihrig and a global environmental and engineering consultancy providing climate, wind, vibration, and building performance services that complement Wilson Ihrig's acoustics offerings.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/wilson-ihrig
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• Facebookfacebook.com/wilsonihrig

Revenue estimate

Valuation estimate

Number of profiles

Profiles8 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about WILSON IHRIG