When i record audio, it plays with no sound, whereas music audio and videos play with good sound, please i need your help on this

Hello Guzang2 and welcome to Apple Support Communities.

I see you are having issues being able to hear things you record with your iPhone. Is this being done with the Voice memos app or is a 3rd-party recording app? And are you able to be heard on phone calls?

You'll find some helpful tips here:

If the microphones on your iPhone, iPad, and iPod touch aren't working - Apple Support

Cheers.