Acute

锐音

       One of the features of sound set up by Jakobson and Halle in their distinctive feature theory of phonology, to handle variations in place of articulation; its opposite is grave. Acute sounds are defined articulatorily and acoustically as those involving a medial articulation in the vocal tract, and a concentration of acoustic energy in the higher frequencies.

雅可布逊和哈勒在其音系学的区别特征理论中确立的语音特征之一，用来描写发音部位的变异；相对立的特征是钝音。锐音在发音和声学上定义为：在声道的中间部位发音，在高频部分集中声学能量。