It's because you're all doing a cross-model synesthetic abstraction, meaning you're saying that that sharp inflection -- ki-ki, in your auditory cortex, the hair cells being excited -- Kiki, mimics the visual inflection, sudden inflection of that jagged shape.
因为诸位都在进行跨模块的共感的抽象， 意思是，你觉得那尖尖的东西看上去像“Kiki”。 在你的听觉皮层中，听毛细胞受刺激,"Kiki" 产生了视觉上的曲折,一种突然的曲折,就像那个锯齿的形状.