Hello and good day *DM*. I am sorry for the trouble this has cause and thank you for the inquiry. The DJI Mavic 2 Remote Controller sounds an alert during RTH or when the battery level is low ( Battery level 6% to 15% ). The sound of DJI Mavic 2 Remote Controller can be turned off by pressing the Remote Controller power button. I would like to ask if you have manage to update the firmware of your unit to it's most recent one? Have you tried to re-link the Remote Controller to the said drone to see if the issue will still persist? Please keep us posted for us to be able to help you further. Thank you for your support.