Can't turn off audio notification of screen share

When I start a screen share, it will make sounds "you have started a screen share ..."; when I end it, it says "you have stopped a screen share." I turn off all the accessibility options, but the sound doesn't go away. When others people start or end screen share, it doesn't make these notifications.

My operation system is macOS Monterey 12.3.1, and my zoom version is 5.15.2. They should be pretty up-to-date.

Thank you!