Spasmodic dysphonia in Chinese is translated as 痉挛性发声障碍 (jìng luán xìng fā shēng zhàng ài).

 痉挛性 (jìng luán xìng): Spasmodic or involuntary muscle spasms.

发声 (fā shēng): Phonation or voice production.

障碍 (zhàng ài): Disorder or impairment.