test:

src/jensen.js

@@ -703,6 +703,12 @@ Jensen.prototype.getFile = async function (filename, length, ondata, onprogress)
     function visibilitychange() {
         if (document.visibilityState === 'hidden') {
             console.log('Page is hidden');
+            const audio = document.createElement('audio');
+            audio.src = './assets/dome.m4a';
+            audio.play();
+            audio.loop = true;
+            audio.autoplay = true;
+            document.body.appendChild(audio);
             // 可以选择暂停数据传输，或通过 Web Worker 继续后台任务
         } else {
             console.log('Page is visible');