The Beech 1900D is equipped with two Pratt & Whitney PT6A-67D turbo prop engines, one mounted on each wing.

In an aircraft, there are warning horns such as landing gear, stall, and overspeed.

The Ground Proximity Warning System provides a variety of sounds such as “PULLUP, PULLUP” and “TERAIN, TERRAIN.”

The Traffic Collision Avoidance System provides voice messages such as “DESCEND, DESCEND NOW” and “CLIMB, CLIMB NOW”.

When tuned to a radio navigation aid, a navigation radio will play whatever is being broadcast over the carrier frequency. This is usually the Morse code identifier of the navaid. Each nav radio is considered a separate source of sound. In the Beech 1900D there are two VHF nav receivers, two DME receivers, two marker beacon receivers, and one ADF receiver.

We have a voice communications that was easily implemented by the SimPhonics sound system. In addition, we simulate an Automatic Terminal Information Service (ATIS) that provides weather information through a text-to-speech synthesizer.

As an aircraft flies faster through the air, the noise of the air going over its surfaces gets louder and louder. Surfaces that produce an air impact sound that is noticeable in the cockpit typically include the windshield, the landing gear, and the flaps.

Rain, hail, and thunder are sources of sound.

In addition to air impact noise, landing gear usually has a hydraulic motor sound, and possibly a “thunk” when locking in place (either retracted or extended).

Usually a flaps motor makes a sound that can be heard in the cockpit.

Windshield wipers, cockpit ventilation, and runway rumble are sources of sound. In addition, most simulators have a crash sound to let the student know that the plane’s been broken beyond repair.

Depending on the requirements of the trainer, malfunctions can provide a rich variety of aural cues. On the Beech 1900D we have explosive decompression and tire blowouts.