Acoustic Consulting Services, National Parks

From 1990 to 2005, HMMH assisted the National Park Service (NPS) with technical expertise on air tours over national parks. We conducted a variety of noise and soundscape studies connected with air tour operations. These included:

  • An evaluation of tour aircraft sound propagation in quiet areas including aircraft audibility models and their relationship to sound level.
  • Measurement and reporting of acoustic profiles in the Grand Canyon, Hawai’i Volcanoes, Haleakalā, Glacier, Grand Teton, Bryce Canyon, and Rocky Mountain National Parks.
  • Development of a sampling plan and performance of park visitor dose-response studies at Grand Canyon, Hawai’i Volcanoes, and Haleakalā National Parks.
  • Preparation of the National Park Service’s Air Tour Overflight Report to Congress, required under Public Law 100-91, 1995.
  • In partnership with the Volpe Center, development of the Air Tour Management Plan (ATMP) Noise Monitoring Protocol.
  • Measurement of air tour and ambient sound levels at Hawai’i Volcanoes National Park.
  • Design and performance of air tour passenger and manager surveys.

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