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  • Petaluma, CA
    Phone: 707.794.0400
    Denver, CO
    Phone: 720.306.8322
  • Founding Partners

    Founders & Principals

    Richard R. Illingworth, P.E., Co-Founder

    Mr. Illingworth began his professional career in 1969 as a Civil Engineer with Caltrans. During his years at Caltrans, he worked in the Environmental Studies Group and was responsible for preparing highway noise impact reports, training staff, and developing traffic noise mitigation measures. In 1975, Mr. Illingworth joined the Office of Noise Control at the California Department of Health. There he aided in the development of the State of California Model Noise Ordinance and the "Guidelines for the Development of the Noise Element of the General Plan." These documents formed the basis of noise planning guidance and policies that continue to be used by cities throughout the state of California.

    Mr. Illingworth began working as an acoustical consultant in 1977. In 1987, he and Richard Rodkin founded Illingworth & Rodkin, Inc. Over his many years as an acoustical consultant, Mr. Illingworth prepared General Plan Noise Elements for Counties and Cities throughout California. He has also prepared noise impact reports for numerous projects including shopping centers, office buildings, industrial complexes, railroads, highways and helipads.  He has done the acoustic design for multi-family housing projects, office complexes and hotels, and has appeared in public meetings and in court as an expert witness. Mr. Illingworth has participated in numerous seminars and short courses dealing with community noise.  He has authored several articles and reports on issues such as land use compatibility and the noise impact of the development of geothermal energy.

    Mr. Illingworth has a BS degree in Civil Engineering for the University of California at Davis. He is a registered Civil Engineer in Colorado and California. Mr. Illingworth retired from practice in 2003, after 34 years in the industry.

    Richard B. Rodkin, P.E., Co-Founder

    Mr. Rodkin began his career as an acoustical consultant in 1973. Since that time, he has been responsible for a wide range of studies in environmental noise, architectural acoustics, and noise control engineering. He assisted staff of the California Energy Commission assessing noise impacts of power generation projects, a solar project, and a transmission line. A research study for Caltrans investigated long-distance diffraction and reflection of noise from sound walls. In another study, he measured underwater sound levels generated by pile driving in San Francisco Bay. Transportation noise and vibration studies include freeways and light-rail systems in the Bay Area and San Diego, and numerous road widening and improvement projects for cities and counties. Other environmental noise studies include port expansions in the Bay Area and Los Angeles; Clean Fuels projects at Bay Area refineries; aircraft noise; new and expanding mines and quarries; power plants and cogeneration projects; geothermal and on-shore oil fields; noise ordinance violations; commercial, institutional, housing and other miscellaneous development projects; Specific Plans, and Noise Elements of General Plans for local governments. He has acted as an expert witness in cases involving traffic noise, construction noise, and a murder case where audibility was an issue.

    During his 42 years in practice, Mr. Rodkin worked continuously in the many aspects of acoustics related to the design of new buildings, the environment, and industry. Building designs included architectural acoustics, sound isolation, and the control of noise and vibration from mechanical equipment. Environmental projects included housing, industrial, office buildings, hospitals, university buildings, TV studios and teleconferencing facilities, churches, restaurants, an airport expansion, and hotels. Transportation noise and vibration studies included freeways, light rail and heavy rail trains, and local roadway improvements.

    Mr. Rodkin has an MS degree in Acoustics from the University of California at Berkeley and a BS degree in Mechanical Engineering from the University of California at Davis. He is a registered Mechanical Engineer in California. Mr. Rodkin retired from practice in 2015.

    Who We Areimg
  • An acoustical engineering firm with experience since 1987 in architectural acoustics learn more
  • Capabilitiesimg
  • Expert consultants dedicated to providing clients with quality service in acoustics management learn more
  • Past Performanceimg
  • Since 1987 Illingworth & Rodkin consultants have conducted over 4,500 proprietary studies in... learn more
  • In the Newsimg

    Illingworth & Rodkin has expanded its presence in the Rocky Mountain Region...learn more

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