Around The Horn Pt 2...

摘要

Part one of this whistle-stop tour through the vast subject of horn loudspeaker design (see HFN December '08) looked at the origins of the classic horn profiles - exponential, Wilson-modified exponential, tractrix, hypex and Kugelwellentrichter - and touched on the central design challenge: achieving an acceptable combination of useful gain, low coloration and tight directivity control. Although the last 20 years have seen the introduction of new, advanced design techniques, including computer simulation using the boundary element method and Earl Geddes' improved waveguide theory, the efficacy of any horn is still judged by these criteria.