9 Ways to Customize Your Canon Rebel t5i
Silence the camera.
If you need the camera to hush up, set the Beep option on Shooting Menu 1 to Disable.
Note that if the option is set to Enable, you also hear a tone when you tap touchscreen-controlled options. If you don't want to hear that tone but still want the non-touchscreen beeps, set the option to Touch to Silence.