private bool SpikeDetected(double soundLimitMultiplier)
{
var hear = false;
var level = _sndDevice.AudioMeterInformation.MasterPeakValue * 100;
if (VolumeQueue.Count() == MaxVolumeQueueLength && level > 1)
{
var avgVol = GetAverageVolume();
hear = level / avgVol >= soundLimitMultiplier;
}
// Keep a running queue of the last X sounds as a reference point
VolumeQueue.Add(level);
return(hear);
}
public async Task <bool> Listen(int millisecondsToListen, double soundLimitMultiplier, CancellationToken cancellationToken)
{
VolumeQueue.Clear();
var stopwatch = new Stopwatch();
var sndDevEnum = new MMDeviceEnumerator();
_sndDevice = sndDevEnum.GetDefaultAudioEndpoint(DataFlow.Render, Role.Multimedia);
stopwatch.Start();
while (stopwatch.ElapsedMilliseconds <= millisecondsToListen)
{
await Task.Delay(TickRate, cancellationToken);
if (SpikeDetected(soundLimitMultiplier))
{
return(true);
}
}
return(false);
}
internal float GetAverageVolume()
{
return(VolumeQueue.Average());
}
