Chosen Solution

I’m watching an anime until such time, I have noticed that the sounds sound crack. it fells once, 30 minutes before I noticed the crack of sound. do you guys have fix for it. thanks for the answer.

Sounds like it’s possible you damaged the speaker in the drop. This can be replaced fairly easily.

Like @jdent said, you’ll need to replace your loud speaker. Tutorial can be found here: iPhone 5s Speaker Replacement