I know this sounds weird, but for work reason we want to ban speakers on rooted tablets (Android 5.0), I searched for the APIs & system files, but couldn't stop it.
Any solution?
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2What about setting the device to Silent? – Michael S. Mar 21 '17 at 17:33
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I dont want the user - in our company - to be able to open it, if he put the volume up no more silence. – JinaneK Mar 23 '17 at 3:27
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TL;DR Set device to silent. Tape it over.
If you're able to open the case, you can easily find the speaker attached to the back (or somewhere near the bottom) where gold contact pins are visible. Tape over the pins and the speaker will stop working totally without getting damaged.
If it's not possible for you to open the case, then set your device to silent mode is your primary option. Taping over the speaker hole helps this to some extent, but not as effective as turning off sound. Because sound is a kind of mechanic vibration, it propagates via (almost) all kinds of media, including solid, liquid and gas (air) so you can't simply block it.
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@JinaneK I did not say 'tap over' but 'tape over' instead. Tape something over means stick a piece of tape on it to cover it from emitting light or generating sound. – iBug Mar 22 '17 at 10:23
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