Below is just a little bit of relevant source from the demo app. As you can see it certainly appears to be listening for audio beacons. Now the interesting part would be to find an easy way to determine which other apps are using this.<p><pre><code>    void a(String s1, String s2, String s3, String s4)
    {
        i();
        p.setVisibility(8);
        w.setVisibility(8);
        s.setVisibility(0);
        s2 = Uri.decode(Uri.encode(s2));
        if (&quot;video&quot;.equals(s4.toLowerCase()))
        {
            s2 = new StringBuilder();
            s2.append(s3);
            t.loadDataWithBaseURL(&quot;file:&#x2F;&#x2F;&#x2F;android_asset&#x2F;&quot;, s2.toString(), &quot;text&#x2F;html&quot;, &quot;utf-8&quot;, null);
            q.setText(&quot;Demo : Audio Beacon Detected&quot;);
            r.setText(s1);
            q.setText(&quot;Found a match !!&quot;);
            return;
        } else
        {
            StringBuilder stringbuilder = new StringBuilder();
            stringbuilder.append(&quot;&lt;html&gt;&lt;body style=&#x27;margin:0;padding:0;background-color:black;&#x27;&gt;&lt;a href=&#x27;&quot;).append(s2).append(&quot;&#x27; &gt;&lt;img src=&#x27;&quot;).append(s3).append(&quot;&#x27; height=250 style=&#x27;margin:0 auto;display:block;&#x27; &#x2F;&gt;&lt;&#x2F;a&gt;&lt;&#x2F;body&gt;&lt;&#x2F;html&gt;&quot;);
            t.loadDataWithBaseURL(&quot;file:&#x2F;&#x2F;&#x2F;android_asset&#x2F;&quot;, stringbuilder.toString(), &quot;text&#x2F;html&quot;, &quot;utf-8&quot;, null);
            s3 = new StringBuilder();
            s3.append(&quot;&lt;html&gt;&lt;body style=&#x27;margin:0;padding:0;background-color:black;&#x27;&gt;&lt;a href=&#x27;&quot;).append(s2).append(&quot;&#x27; &gt;&lt;img src=&#x27;&quot;).append(s4).append(&quot;&#x27; height=50 style=&#x27;margin:0 auto;display:block;&#x27; &#x2F;&gt;&lt;&#x2F;a&gt;&lt;&#x2F;body&gt;&lt;&#x2F;html&gt;&quot;);
            u.loadDataWithBaseURL(&quot;file:&#x2F;&#x2F;&#x2F;android_asset&#x2F;&quot;, s3.toString(), &quot;text&#x2F;html&quot;, &quot;utf-8&quot;, null);
            q.setText(&quot;Demo : Audio Beacon Detected&quot;);
            r.setText(s1);
            q.setText(&quot;Found a match !!&quot;);
            return;
        }
    }</code></pre>