相关疑难解决方法(0)

我正在尝试语音识别样本.如果我开始通过麦克风识别我的演讲,那么我试图让iPhone听到那个公认的文字.这是工作.但是,声音太低了.你可以指导我吗？

而不是,如果我尝试简单的按钮操作,使用AVSpeechUtterance代码,音量是正常的.

之后,如果我选择startRecognise()方法,音量太低.

我的守则

func startRecognise()
{
let audioSession = AVAudioSession.sharedInstance()  //2
    do
    {
        try audioSession.setCategory(AVAudioSessionCategoryPlayAndRecord)
        try audioSession.setMode(AVAudioSessionModeDefault)
        try audioSession.setMode(AVAudioSessionModeMeasurement)
        try audioSession.setActive(true, with: .notifyOthersOnDeactivation)
        try AVAudioSession.sharedInstance().overrideOutputAudioPort(AVAudioSessionPortOverride.speaker)
    }
    catch
    {
        print("audioSession properties weren't set because of an error.")
    }
    recognitionRequest = SFSpeechAudioBufferRecognitionRequest()
    guard let inputNode = audioEngine.inputNode else {
        fatalError("Audio engine has no input node")
    }
    guard let recognitionRequest = recognitionRequest else {
        fatalError("Unable to create an SFSpeechAudioBufferRecognitionRequest object")
    }
    recognitionRequest.shouldReportPartialResults = true
    recognitionTask = speechRecognizer.recognitionTask(with: recognitionRequest, …