Frequency range of acoustic horn enclosing gas with various sound speeds

[摘要] Acoustic horns are one of the popular acoustic devices that have been used for a long time in various situations, including outdoor public-address systems [1,2]. Acoustic horns of various shapes have long been known, including not only the most standard exponential horn but also the hyperbolic horn with better output near the cutoff frequency. Acoustic horns are generally applied to loudspeakers; however recently, applications of multiple acoustic horns as an acoustic lens to directional microphones have been proposed.

[学科分类] 声学和超声波

[关键词] Acoustic horn;Horn loudspeaker;Cutoff frequency;Sound speed;Gas substitution