C#获取设备话筒主峰值（实时音频输出分贝量）

1.引用类库NAudio，Git地址 https://github.com/naudio/NAudio

2.添加如下代码和引用：

 public float GetVoicePeakValue()
        {
            var enumerator = new MMDeviceEnumerator();
            var CaptureDevices = enumerator.EnumerateAudioEndPoints(DataFlow.Capture, DeviceState.Active).ToArray();
            var defaultDevice = enumerator.GetDefaultAudioEndpoint(DataFlow.Capture, Role.Console);
            var selectedDevice = CaptureDevices.FirstOrDefault(c => c.ID == defaultDevice.ID);
            return selectedDevice.AudioMeterInformation.MasterPeakValue;
        }