Could you please let us know the version of Acrobat Reader app installed on the machine?
To check the version, launch Reader>tap 3 vertical dots in the top right corner of the screen>Help.
Tap three vertical dots again and select About Adobe Acrobat
What is the version of Android installed on the tablet?
From the device home screen, tap Settings>About Phone
Adorobat, thanks for your reply.
The version of the app is 17.0 (build 164574) and the version of Android on my tablet is 4.4.4 KTU84P. I have borrowed a Galaxy Tab S from a friend with Android v. 6.0.1 and have tried it with the same version of the application, the result was the same (the camera sound appeared every time I tried to scan).
Thank You for sharing the info.
Could you please try reinstalling the Acrobat Reader app and see if that helps?
I have already tried reinstalling the app several times but to no avail.
Just tried it once more on two different devices, the sound still appears.