检查用户是否插入了麦克风[重复]

Question

我有一个检查浏览器是否支持语音识别的功能，它会提醒它是否支持，并且效果很好，除了当用户使用谷歌浏览器时它不会提醒任何东西，但是没有插入麦克风。

我希望它检查用户是否插入了麦克风。那可能吗？

function recognize() {

window.speechRecognition = window.speechRecognition || window.webkitSpeechRecognition || window.mozSpeechRecognition || window.webkitSpeechRecognition;

if (window.speechRecognition == undefined) { 
alert("Speech Recognition Only Supported in Google Chrome"); 
} //end of if (window.speechRecognition == undefined)
else {
alert("Speech Recognition is Supported.");
} //end of else if (window.speechRecognition != undefined)

} //end of function recognize()

Answer 1

if(confirm('Is your microphone plugged in?')) {
    //they said yes :-)
} else {
    //they said no :-(
}