Here are some enhanced and much more realistic Alerts, GPWS sounds and what for they are in the BOEING 777. All sounds are from REAL Boeing recordings and videos.
General alerting sounds are chosen by the manufacturer of the cockpit systems. Stall warnings, autopilot disconnect alerts, fire alarms etc. are all not standardised, with the exception of the words spoken by the GPWS/TAW and TCAS system.
Whilst the exact sounds of these two systems are not standardised in the sense that a standard. wav file is to used by all manufacturers, the phraseology in their aural alerts is standard.
The system monitors an aircraft’s height above ground as determined by a radar altimeter. A computer then keeps track of these readings, calculates trends, and will warn the flight crew with visual and audio messages if the aircraft is in certain defined flying configurations (“modes”).
The modes are:
- Excessive descent rate (“SINK RATE” “PULL UP”)
- Excessive terrain closure rate (“TERRAIN” “PULL UP”)
- Altitude loss after takeoff or with a high power setting (“DON’T SINK”)
- Unsafe terrain clearance (“TOO LOW – TERRAIN” “TOO LOW – GEAR” “TOO LOW – FLAPS”)
- Excessive deviation below glideslope (“GLIDESLOPE”)
- Excessively steep bank angle (“BANK ANGLE”)
- Windshear protection (“WINDSHEAR”)