选择或禁用警报声音
计算机将播放简短的响铃音，提醒当前的消息或事件。可以选择不同的声音主题，单独设置警报音量，或者禁用警报提醒声音。
Go to the desktop and start typing Sound.
Click on Sound to open the panel.
In the Alert Sound section, select an alert sound. Each sound will play when you click on it so you can hear how it sounds.
Use the volume slider for System Sounds in the Volume Levels section to set the volume of the alert sound. This will not affect the volume of your music, movies, or other sound files.