GoPro is an amateur camera that allows you to shoot high-action videos in HD like a professional. Each action performed on your GoPro camera is followed by a small beep. If you find this feature annoying and would like to disable it, then you may find this tutorial helpful.
Turn Off the Sound on Your GoPro Camera
Press the Mode button until you reach the setup menu, which can be accessed via the cog icon.
Using the Shutter button, select the Beeps menu > Off.