PL436767A1 - Horn loudspeaker - Google Patents

Abstract

The loudspeaker includes a mounting plate (1) with a loudspeaker (2) mounted thereon, and a base plate (3) attached to it. Both plates (1, 2) have, on the inner sides facing each other, in parts adjoining the outer edge in the shape of a circle, rotational surfaces (4, 5) which are deviated from each other along their entire length by an angle (α) included in between 5 ° and 12 ° measured in a plane passing through an axial straight line (6). The pivoting surface (5) of the base plate (3), in the central part, is formed in the shape of a cone (7) with a domed tip protruding towards the diaphragm of the loudspeaker (2). The pivoting surface (4) of the mounting plate (1) in the lower part, shaped like a hole, is connected with a conical sleeve (8), the upper, narrower end of which is brought into the hole in the loudspeaker housing (2). The existing gap between the revolving surfaces (4, 5) forming the acoustic tunnel is closed with an omnidirectional layer made of a sound-permeable sponge (9) and a metal mesh (10) as a support. The base plate (3) is equipped with a sleeve (11) with a conical opening for insertion of the hand carrying shaft or the shaft of a backpack carrier. In a different version, the base plate (3) is equipped with a magnetic plate that allows the loudspeaker to be attached to the car body or other ferromagnetic elements.