Hi sevko123,
For help with the internal speakers on your MacBook Air, test the steps below found in the article here: If the internal speakers on your Mac aren't working - Apple Support
"Check your sound settings
First, disconnect any cables from the USB, Thunderbolt, or 3.5mm audio ports on your Mac.
- From the Apple menu , choose System Settings (or System Preferences).
- Click Sound.
- Click the Output tab, then select the built-in speakers. If you don’t see built-in speakers as an option in the Output window, contact Apple Support.
- If the Output volume slider is set low, move the slider to the right and test again.
- If the Mute checkbox is selected, deselect it and test again.
- If you still don’t hear any sound, contact Apple Support."
If you have additional concerns about the noise you heard or to help determine if it is a hardware issue reach out to Apple Support directly to further assist.
Contact - Official Apple Support
Contact Apple for support and service - Apple Support
Best.