In general voice prompts have been designed to get status of configuration and operations of the camera. But sometimes it can be troublesome in environments where silence is more preferable.

Most of Maizic cameras which work on V380  support this feature. 

Locate the three dots on live camera . These dots take you to settings . 

  Then locate the folowing path:

Advanced setting- device voice prompt and switch off the promots.
Please note this feature may not be available with all cameras.