The word(s) "sound" appears 21 time(s) in 20 verse(s) in Quran in Abdullah Yusuf Ali translation.

(11) "And be moderate in thy pace, and lower thy voice; for the harshest of sounds without doubt is the braying of the ass."

(12) That He may make your conduct whole and sound and forgive you your sins: He that obeys Allah and His Messenger, has already attained the highest achievement.

(13) The trumpet shall be sounded, when behold! from the sepulchres (men) will rush forth to their Lord!

(14) Behold! he approached his Lord with a sound heart.

(15) We strengthened his kingdom, and gave him wisdom and sound judgment in speech and decision.

(16) The Trumpet will (just) be sounded, when all that are in the heavens and on earth will swoon, except such as it will please Allah (to exempt). Then will a second one be sounded, when, behold, they will be standing and looking on!

(17) He created man from sounding clay like unto pottery,

(18) Then, when one blast is sounded on the Trumpet,

(19) Finally, when the Trumpet is sounded,

(20) The Day that the Trumpet shall be sounded, and ye shall come forth in crowds;