| 摘要 |
FIELD: physics.SUBSTANCE: method of making an acoustic horn involves creating a horn model with a profile in the form of an exponent and/or tractrix, dividing the model into a central part and two lateral parts, dividing each part with vertical planes parallel to the plane of symmetry and lying at a distance from each other to form a pattern, cutting flat elements from a thin-wall plate on the patterns, said elements having thickness which is equal to the distance between the vertical planes, and connecting the flat elements by adjoining the flat sides to form the central part of the horn. Each lateral part of the horn is formed by series-connection of plates with thickness of not less than 0.1 mm to form a stepped curve in a plane perpendicular to the plane of symmetry of the acoustic horn, and the lateral parts are then connected to lateral sides of the central part. The acoustic horn is a housing with an input opening and an output opening. The housing has a cavity linking said openings, said cavity being bounded by the wall with a profile in the form of an exponent and/or tractrix, wherein the housing is made from the central part having a width of not less than the cross dimension of the input opening, and two lateral parts attached to the central part to its lateral surfaces. The central part is made of a set of lateral surfaces of plates attached to each other.EFFECT: improved acoustic properties of the horn.3 cl, 7 dwg |
