Full disclosure: I work for an audio beacon startup (in bio).<p>You&#x27;re correct about microphone permissions related to the SDK.  On iOS, this means displaying the top colored bar when you&#x27;re using the microphone too... IMHO it&#x27;s not something you can just turn on and not realize it&#x27;s being used.<p>We use our listening tech at concerts and event to distribute triggered content and messages from the speaker infrastructure to attendees&#x27; phones (ex. &quot;this drink line is long, go to the other one&quot;, &quot;here&#x27;s a free song from the artist on stage right now&quot;, &quot;&lt;sponsor&gt; is giving away a free thing&quot;, etc.)