https://learn.microsoft.com/en-us/dotnet/api/system.speech.recognition.recognizecompletedeventargs.initialsilencetimeout?view=netframework-4.8.1&viewFallbackFrom=net-10.0-pp
RecognizeCompletedEventArgs.InitialSilenceTimeout Property (System.Speech.Recognition) | Microsoft...
Gets a value that indicates whether an initial silence timeout generated the RecognizeCompleted event.
property systemspeech recognitionmicrosoft