remove audio node

src/jensen.js

@@ -721,6 +721,11 @@ Jensen.prototype.getFile = async function (filename, length, ondata, onprogress)
         }
     }
 
+    function removeAudio() {
+        const audio = document.getElementById('test_audio');
+        audio && audio.remove();
+    }
+
     document.addEventListener('visibilitychange', visibilitychange);
 
     let flen = 0;
@@ -730,11 +735,13 @@ Jensen.prototype.getFile = async function (filename, length, ondata, onprogress)
             ondata(msg.body);
             if (flen >= length) {
                 document.removeEventListener('visibilitychange', visibilitychange);
+                removeAudio();
                 // return OK indicates all file blocks received
                 return 'OK';
             }
         } else {
             document.removeEventListener('visibilitychange', visibilitychange);
+            removeAudio();
             ondata('fail');
         }
     };