Adding more default environment values and renaming speed of sound

include/ITAConstants.h

@@ -66,9 +66,25 @@ namespace ITAConstants
 	static std::vector< float > OCTAVE_CENTER_FREQUENCIES_ISO_F = { 31.5f, 63, 125, 250, 500, 1000, 2000, 4000, 8000, 16000 };
 	static std::vector< double > OCTAVE_CENTER_FREQUENCIES_ISO_D = { 31.5f, 63, 125, 250, 500, 1000, 2000, 4000, 8000, 16000 };
 
-	// Speed of sound 
-	static float SPEED_OF_SOUND_F = 344.0f;
-	static double SPEED_OF_SOUND_D = 344.0f;
+	// Default speed of sound at 344 m/s
+	static double DEFAULT_SPEED_OF_SOUND_D = 344.0f; // m/s
+	static float DEFAULT_SPEED_OF_SOUND_F = (float) DEFAULT_SPEED_OF_SOUND_D; // m/s
+
+	// Dfault humindity at 80% 
+	static double DEFAULT_HUMIDITY_D = 80.0f; // Percent
+	static float DEFAULT_HUMIDITY_F = (float)DEFAULT_HUMIDITY_D; // Percent
+
+	// Default temperature at 20 centigrade (degree celcius)
+	static double DEFAULT_TEMPERATURE_D = 20.0f; // C
+	static float DEFAULT_TEMPERATURE_F = (float)DEFAULT_TEMPERATURE_D; // C
+
+	// Default static pressure at 100125.0 Pa
+	static double DEFAULT_STATIC_PRESSURE_D = 101325.0f; // Pascal (absolute)
+	static float DEFAULT_STATIC_PRESSURE_F = (float)DEFAULT_STATIC_PRESSURE_D; // Pascal (absolute)
+
+	// Legacy, please use DEFAULT_SPEED_OF_SOUND instead
+	static double SPEED_OF_SOUND_D = DEFAULT_SPEED_OF_SOUND_D; // m/s
+	static float SPEED_OF_SOUND_F = DEFAULT_SPEED_OF_SOUND_F; // m/s	
 };
 
 #endif // INCLUDE_WATCHER_ITA_CONSTANTS