According to a Request for Information (RFI) posted on the FedBizOpps website on January 18 (PDF), the DHS, in tandem with the Secret Service, “Is seeking information on commercially available gunshot detection technologies for fixed site surveillance applications. Typical coverage areas are expected to be from 10s to 100s of acres per site, located within urban areas. Due to the secure nature of these sites, a high gunshot detection rate (>95%) is strongly desired while daily, operational monitoring of the system by external parties is undesirable.”

 

Note that the location of the surveillance system will be in “urban areas,” and will cover hundreds of acres per each unit, meaning the detection technologies are not merely being prepared for sensitive areas around the White House or the Capitol building.