San Francisco police officer Rich Lee vividly remembers the first time he tested the Rumbler in real traffic conditions. It was a day when the manufacturer, Federal Signal, was in town to show off the ...

Hot on the heels of DIRAC's announcement regarding their Active Room Treatment (ART) approach, Trinnov has introduced their WaveForming technology, which presents remarkably similar claims and ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. In addition to the Low Frequency Effects information carried in the ".1" channel of a ...

Sounds that are lower pitched are less studied than other types. Some say it’s a health hazard. Others have doubts. By Lourdes Medrano/Undark Published Apr 17, 2024 8:00 AM EDT This article was ...