Hello Ggyuu,
We'd like to provide you with some information that may be able not assist you with the camera sounds on your iPhone:
"Adjust the shutter volume on your iPhone camera
You can adjust the sound of the Camera
shutter, or mute it using the Ring/Silent switch on the side of your iPhone.
Change the volume of the shutter sound in Photo mode
- In Camera, switch to photo mode.
- Open Control Center, then drag
up or down. - Swipe up from the bottom of the screen to go back to Camera.
Note: The shutter doesn’t make a sound when Live Photos
is turned on (except in some countries and regions).
Mute the shutter sound
Mute the shutter sound using the Ring/Silent switch on the side of your iPhone. To put iPhone in silent mode, set the Ring/Silent switch so that the switch shows orange. To turn off silent mode, set the switch back.
Note: In some countries and regions, you can’t mute the shutter sound."
We hope this helps.