braaamEtymologyOnomatopoeic.nounA low, loud sound, originally produced by brass instruments and a prepared piano but sometimes made synthetically, included in film and trailer scores to increase audience stress.“Most agree that Hollywood's obsession with braaams began with a series of trailers for Christopher Nolan's 2010 film, Inception. But just who invented them is "a very, very, very touchy subject," according to Bobby Gumm, head of music for Trailer Park, the company behind such braaam-filled trailers as Mad Max: Fury Road and Mission: Impossible — Rogue Nation.”