Speaker grille for streamlined light bar mounted on vehicle roof

Claim 1

In a combination light/siren assembly of a type to be mounted across the roof of an emergency vehicle and having an elongated housing which extends across the vehicle roof in spaced relation thereto, including warning lights mounted in said housing, and a siren speaker located in said housing, the improvement comprising, a speaker grille incorporated into said housing forwardly of said siren speaker and formed with a leading portion which divides oncoming air into separate streams which flow above and below said grille, said speaker grille having a plurality of small openings formed therein for emitting sound waves from said siren speaker, said openings being provided in a non-linear profile in an upper portion of said speaker grille so as to extend to a greater height in two laterally spaced outer side areas and to a lesser height in a central area of said speaker grille, whereby air entering said housing through openings in the front of said grille will be substantially restricted from exiting upwardly into the air stream flowing above said housing, and the acoustical characteristics of said speaker grille will be enhanced by the higher level of openings at said two laterally spaced upper side areas of said grille.