Blocking mobile phone functionality?

Question

Android

Guys, good afternoon.
The essence of the question is this: is it possible to create a mobile application or service that will block phone functions in a certain room or zone, namely a camera and a voice recorder?
If anyone has experience creating such a huge request to share please and is it even possible? I am not strong in mobile development just starting to master this area.
I am clarifying the question: the blocking is needed by force and, if possible, without installing the application.
As for who wants it, there is no question here, visitors to the premises are warned about this and agree by default.
Specialist. jammers and various kinds of "veil" and infrared light are not accepted, adm resource too. The customer asks to solve the problem programmatically. In addition, such solutions have already been implemented in some state. institutions. At the entrance, a message appears about the blocking; at the exit, the unlock button.

Answer 1

Is it possible to create a mobile application or service that will block phone functions in a certain room or zone, namely a camera and a voice recorder?

Theoretically possible, but
Or use a hardware Speech Jammer/Audio Jammer to prevent voice recording.
For video, it may be suggested to use a powerful infrared illuminator(s) in a specific spectrum.
But the question is how will this affect the health of people in this room?
This is only at the level of the OS kernel, or in hardware.
But this is unlikely for you.