Noise and Vibration Consulting for Rail

Providing innovative solutions for a better future

You can rely on our team of consultants to address your environmental challenges
in every market that we serve, worldwide.

Technical excellence, true collaboration, and innovation are the foundation
of every project we complete.

Our Markets

Additional Markets

HMMH is a trusted leader in the study, assessment, and mitigation of the impacts of new and existing transportation projects on communities.


Recent Blog Posts One Year Anniversary of SoCal Office Opening

Today marks the one year anniversary of the opening of HMMH’s Southern California Office! Our Anaheim location has staff from our…

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Recent News HMMH Commits to Offsetting Carbon from Air Travel

As a national firm with staff and clients located throughout the world, HMMH employees must travel a good deal to serve…

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Recent Presentations & Papers Weather Effects on Propagation of Aircraft Noise

Presentation given by Joseph Czech during NOISE-CON 2019 in San Diego, CA on Weather Effects on Propagation of Aircraft Noise. To…

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HMMH has supported Massport for over 30 years providing technical analyses for a wide variety of projects at our airports. I confidently recommend HMMH to provide high quality environmental services in a timely and efficient manner. They are truly experts in their field.

- Senior Project Manager, Massachusetts Port Authority

HMMH did a first-rate job. The results of the study were exactly what we were looking for to help strike a balance between the rights of residents and the need for a local business to thrive and foster the area’s tourism industry. HMMH would be my first call when faced with a similar problem in the future.

- Page County Administrator, Shenandoah, VA

HMMH’s efforts were instrumental in the Authority’s ultimate success in providing an outstanding project that exceeded FAA requirements, met our noise-impacted community’s expectations and stayed within our budget. I would highly recommend HMMH to any airport that demands a successful, transparent and quality project.

- Former (Retired) Director, Airport Noise Mitigation, San Diego Regional Airport Authority

HMMH's understanding of state and federal requirements along with their responsiveness to project needs make HMMH the gold standard in their field.

- Project Manager, Stantec

HMMH is an extremely professional firm with excellent response time. Work is always of the highest caliber. The firm is trusted and respected by our citizens, staff and the Board of County Commissioners.

- Airport Director, Martin County Airport

HMMH consistently provided high quality products and their advice was invaluable in guiding the JPDO's effort to frame important policy issues to key government decision makers.

- Project Manager, JPDO