If you are a regular BigBlueButton administrator, you have received user complaints about audio alerts. 

When a user in a session mutes himself, the audio alerts goes: You are muted now.

Similarly, when a user unmutes to start speaking, the audio alerts goes: You are unmuted now.

You can easily fix it. 

open` /opt/freeswitch/etc/freeswitch/autoload_configs/conference.conf.xml`

And search for the following code:

<param name="muted-sound" value="conference/conf-muted.wav"/>

<param name="unmuted-sound" value="conference/conf-unmuted.wav"/>

<param name="alone-sound" value="conference/conf-alone.wav"/>

 Now, comment the code block like below

<!--param name="muted-sound" value="conference/conf-muted.wav"/-->

<!--param name="unmuted-sound" value="conference/conf-unmuted.wav"/-->

<!--param name="alone-sound" value="conference/conf-alone.wav"/-->

Then, restart the BigBlueButton server using the command:

bbb-conf --restart

Let us know how it goes?