![](https://www.acluhi.org/sites/default/files/styles/thumbnail_130x110/public/field_image/12.11.23-press-release-hawaii-supreme-court-hearing-maui-sweeps-announcement-1.png?itok=0YLsoP4q)
In July 2019, the ACLU of Hawai‘i learned that the state purchased a long-range acoustic device ("LRAD") to use at the Thirty Meter Telescope ("TMT") demonstrations on Mauna Kea. LRADs are military-oriented weapons commonly referred to as a "sound cannon."
With concerns over the LRAD's possible "chilling effect" on the public, we wrote a demand letter to the state asking them to reassure the public that the LRAD would not be used.
Read the letter below.