Uploaded July 2025 | Updated September 2026, 2 weeks ago

---

The loudest siren ever built is the Chrysler Air Raid Siren, specifically the second-generation model introduced in 1952, which utilized a 180-horsepower Chrysler Hemi V8 engine. It produced an ear-shattering 138 decibels at a distance of 100 feet, similar to the sound of a jet engine at the same range.