Sometimes Weird metal sound when i hit shuttlecock

[Theo]

Hey lately i noticed a metaly afterspund when hitting the shuttlecock light. I got a Yonex Astrox 100zz with i think 21lbs bg65 strings. My racket has some damage ok the outside, a bit of the varnish is damaged. Bit again not every time i hit the ball it makes this sound and it only appeared since like a week. What could cause something like that? That tone is killing me.

 

[NickifiedNg]

Probably you're hitting the racket frame. That's why there's chips on your racket

 

[Theo]

Listen, I am a beginner but im not writing a complain cause im hitting the racket frame. No Im hitting normal.

 

[Budi]

Where the sound come from?
See if there is any grommet that are broken which maybe the chipped grommet stuck inside the frame.
Check if maybe you shaft woble. The sound might come from inside the cone usually.