test.js

function sendSpeech() {
  var recognition = new SpeechRecognition()
  var speechRecognitionList = new SpeechGrammarList()
  recognition.grammars = speechRecognitionList
  recognition.lang = 'ko'
  recognition.interimResults = false // true: 중간 결과를 반환, false: 최종 결과만 반환
  recognition.continious = false // true: 음성인식을 계속해서 수행, false: 음성인식을 한번만 수행
  recognition.maxAlternatives = 10

  recognition.start()

  recognition.onresult = function (event) {
    var speechResult = event.results[0][0].transcript.toLowerCase()
    console.log('Confidence: ' + event.results[0][0].confidence)
    console.log('Speech Result: ' + speechResult)
  }

  recognition.onaudiostart = function (event) {
    //Fired when the user agent has started to capture audio.
    console.log('SpeechRecognition.onaudiostart')
  }

  recognition.onaudioend = function (event) {
    //Fired when the user agent has finished capturing audio.
    console.log('SpeechRecognition.onaudioend')
  }

  recognition.onend = function (event) {
    //Fired when the speech recognition service has disconnected.
    console.log('SpeechRecognition.onend')
  }

  recognition.onnomatch = function (event) {
    //Fired when the speech recognition service returns a final result with no significant recognition. This may involve some degree of recognition, which doesn't meet or exceed the confidence threshold.
    console.log('SpeechRecognition.onnomatch')
  }

  recognition.onsoundstart = function (event) {
    //Fired when any sound — recognisable speech or not — has been detected.
    console.log('SpeechRecognition.onsoundstart')
  }

  recognition.onsoundend = function (event) {
    //Fired when any sound — recognisable speech or not — has stopped being detected.
    console.log('SpeechRecognition.onsoundend')
  }

  recognition.onspeechstart = function (event) {
    //Fired when sound that is recognised by the speech recognition service as speech has been detected.
    console.log('SpeechRecognition.onspeechstart')
  }
  recognition.onstart = function (event) {
    //Fired when the speech recognition service has begun listening to incoming audio with intent to recognize grammars associated with the current SpeechRecognition.
    console.log('SpeechRecognition.onstart')
  }
}