Greetings ToongTaoDaeng,
It sounds like you have charging sounds enabled. Learn how to disable these sounds below:
"Turn off charging case sounds on AirPods Pro (2nd generation)
Your AirPods Pro (2nd generation) charging case plays a sound when it pairs, charges, and more. You can turn off these sounds.
- Wear your AirPods, and make sure they’re connected to your device.
- Do one of the following:
- On iPhone, iPad, or iPod touch: Go to Settings
, tap the name of your AirPods near the top of the screen, then turn Enable Charging Case Sounds on or off. - On Mac: Choose Apple menu
> System Settings, click the name of your AirPods in the sidebar (you may need to scroll down), then turn “Enable charging case sounds” on or off" Change settings for AirPods Pro (all generations)
We hope this helps to explain why you were hearing those sounds.
Best wishes