Simplified Falcon BMS Speech Recognition

Porgam.cs

using System;
using System.Speech.Recognition;

namespace SpeechRecognitionApp
{
    class Program
    {
        static void Main(string[] args)
        {

            foreach (RecognizerInfo ri in SpeechRecognitionEngine.InstalledRecognizers())
            {
                Console.WriteLine("Installed recognizer: " + ri.Description);
            }

            using (SpeechRecognitionEngine recognizer = new SpeechRecognitionEngine(new System.Globalization.CultureInfo("en-US")))
            {
                recognizer.LoadGrammar(CreateTowerGrammar());
                recognizer.LoadGrammar(CreateTankerGrammar());

                recognizer.SpeechRecognized +=
                  new EventHandler<SpeechRecognizedEventArgs>(CommandRecognized);

                recognizer.SetInputToDefaultAudioDevice();
                recognizer.RecognizeAsync(RecognizeMode.Multiple);

                while (true)
                {
                    Console.ReadLine();
                }
            }
        }

        static Grammar CreateTowerGrammar()
        {
            GrammarBuilder towerElement = new GrammarBuilder(new Choices(new string[] { "tower", "approach" }));

            GrammarBuilder requestLandingPhrase = new GrammarBuilder();
            requestLandingPhrase.Append(towerElement);
            requestLandingPhrase.Append(new GrammarBuilder(new Choices(new string[] { "request", "request permission" })));
            requestLandingPhrase.Append(new GrammarBuilder(new Choices(new string[] { "land", "landing", "to land" })));

            Choices bothChoices = new Choices(new GrammarBuilder[] { requestLandingPhrase });
            Grammar grammar = new Grammar(bothChoices)
            {
                Name = "Tower Grammar"
            };
            return grammar;
        }

        static Grammar CreateTankerGrammar()
        {
            GrammarBuilder tankerElement = new GrammarBuilder(new Choices(new string[] { "tanker", "texaco", "copper" }));

            GrammarBuilder requestRefuelPhrase = new GrammarBuilder();
            requestRefuelPhrase.Append(tankerElement);
            requestRefuelPhrase.Append("request");
            requestRefuelPhrase.Append(new GrammarBuilder(new Choices(new string[] { "refuel", "refueling" })));

            GrammarBuilder preContactPhrase = new GrammarBuilder();
            preContactPhrase.Append(tankerElement);
            preContactPhrase.Append("ready");
            preContactPhrase.Append(new GrammarBuilder(new Choices(new string[] { "pre-contact", "contact" })));

            GrammarBuilder doneRefueling = new GrammarBuilder();
            doneRefueling.Append(tankerElement);
            doneRefueling.Append("done");
            doneRefueling.Append(new GrammarBuilder(new Choices(new string[] { "refuel", "refueling" })));

            Choices choices = new Choices(new GrammarBuilder[] { requestRefuelPhrase, preContactPhrase, doneRefueling });
            Grammar grammar = new Grammar(choices)
            {
                Name = "Tanker Grammar"
            };
            return grammar;
        }

        static void CommandRecognized(object sender, SpeechRecognizedEventArgs e)
        {
            Console.WriteLine(e.Result.Grammar.Name + ": " + e.Result.Text);
        }
    }
}

Sample Output

Installed recognizer: Microsoft Speech Recognizer 8.0 for Windows (English - US)
Installed recognizer: Microsoft Speech Recognizer 8.0 for Windows (English - UK)
Tanker Grammar: texaco request refueling
Tanker Grammar: texaco ready pre-contact
Tanker Grammar: texaco done refueling
Tower Grammar: approach request permission to land