检测静音，通过语音获取用户输入

Question

我试图检测静音，以便停止录制麦克风的音频。我目前的代码是：

public byte[] getRecord() throws AudioException {
    try {
        // Reset the flag
        stopped = false;

        // Start a new thread to wait during listening
        Thread stopper = new Thread(() -> {
            try {
                BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
                br.readLine();
                stopped = true;
            } catch (IOException ex) {
                ex.printStackTrace();
            }
            stop();
        });

        // Start the thread that can stop the record
        stopper.start();

        return record();
    } catch (Exception e) {
        throw new LineUnavailableException("Unable to record your voice", e);
    }
}

private byte[] record() throws LineUnavailableException {
    AudioFormat format = AudioUtil.getAudioFormat(audioConf);
    DataLine.Info info = new DataLine.Info(TargetDataLine.class, format);

    // Checks if system supports the data line
    if (!AudioSystem.isLineSupported(info)) {
        return null;
    }

    microphone = (TargetDataLine) AudioSystem.getLine(info);
    microphone.open(format);
    microphone.start();

    System.out.println("Listening, tap enter to stop ...");

    ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
    int numBytesRead;
    byte[] data = new byte[microphone.getBufferSize() / 5];

    // Begin audio capture.
    microphone.start();

    // Here, stopped is a global boolean set by another thread.
    while (!stopped) {
        // Read the next chunk of data from the TargetDataLine.
        numBytesRead = microphone.read(data, 0, data.length);
        // Save this chunk of data.
        byteArrayOutputStream.write(data, 0, numBytesRead);
    }

    return byteArrayOutputStream.toByteArray();
}

目前我使用shell停止录制，但我想知道如何在while循环中停止录制。