Acoustic triangulation
Sound
This page is public-interest research. An argument grade is not a court finding. A watchdog page describes the device. It is not proof a Nevada agency bought it or turned a feature on. A product description is not a Nevada practice. Agencies are not merged: the City of Las Vegas Department of Public Safety, the Las Vegas Metropolitan Police Department, the Clark County School District, the City of Reno, and the Nevada Department of Public Safety stay separate. A hotlist hit is not a confirmed crime. Legal review of this page is unverified.
What it does
Acoustic triangulation estimates where a sound came from by measuring when it arrived at several microphones. Gunshot-detection systems use that method to place a possible gunshot on a map. The method is the location step. It is not a separate sensor from the microphones on the gunshot card.
Privacy watchdog concerns
- Electronic Frontier Foundation. Gunshot Detection. EFF says acoustic gunshot systems use microphones to detect and locate a possible gunshot, that the match is often wrong, and that the same microphones can capture voices. EFF names ShotSpotter and Flock Raven as products of this type. This is EFF’s claim. It is not an LVMPD purchase.
Constitutional issues
Unresolved question
Fourth Amendment
Warrant practice not established for a Nevada agency
Acoustic triangulation: EFF says gunshot systems locate a sound by comparing arrival times. That is a description of the method. No Nevada system is documented, and no case in this library decides the method.
No decision in this library decides acoustic triangulation. The gunshot page’s claims are not converted into a holding.
Statutes attached to read, not findings.
- NRS Chapter 239. Nevada public-records law is the route to ask for contracts, policies, and logs. Citing it is not a finding that a surveillance practice is unlawful.
- Nevada Constitution art. 1, § 18. State search-and-seizure provision. This page does not quote the section. No section anchor was verified. It is listed only where a search question is actually implicated.
- 42 U.S.C. § 1983. A civil remedy for a deprivation of federal rights under color of state law. It is not a warrant statute, and it does not itself make a surveillance practice unlawful.
Nevada use
Not documented on this page.
Method only. The products are named on the gunshot card.
See also: Gunshot detection (ShotSpotter and Flock Raven)
Next record
Acoustic triangulation: Do not file this as a second gunshot system.
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