Direct Voice Input (sometimes called Voice Input Control (VIC)) is a style of Human-Machine Interaction

User interface

The user interface, in the industrial design field of human–machine interaction, is the space where interaction between humans and machines occurs. The goal of interaction between a human and a machine at the user interface is effective operation and control of the machine, and feedback from the...

 "HMI" in which the user makes voice commands to issue instructions to the machine

Voice User Interface

A Voice–user interface makes human interaction with computers possible through a voice/speech platform in order to initiate an automated service or process....

. It has found some usage in the design of the cockpits of several modern military aircraft, particularly the Eurofighter Typhoon

Eurofighter Typhoon

The Eurofighter Typhoon is a twin-engine, canard-delta wing, multirole combat aircraft, designed and built by a consortium of three companies: EADS, Alenia Aeronautica and BAE Systems; working through a holding company, Eurofighter GmbH, which was formed in 1986...

, the F-35 Lightning II

F-35 Lightning II

The Lockheed Martin F-35 Lightning II is a family of single-seat, single-engine, fifth generation multirole fighters under development to perform ground attack, reconnaissance, and air defense missions with stealth capability...

, the Dassault Rafale

Dassault Rafale

The Dassault Rafale is a French twin-engine delta-wing multi-role jet fighter aircraft designed and built by Dassault Aviation. Introduced in 2000, the Rafale is being produced both for land-based use with the French Air Force and for carrier-based operations with the French Navy...

 and the JAS 39 Gripen

JAS 39 Gripen

The Saab JAS 39 Gripen is a lightweight single-engine multirole fighter manufactured by the Swedish aerospace company Saab. It was designed to replace the Saab 35 Draken and 37 Viggen in the Swedish Air Force...

, having been trialled on earlier fast jets such as the Harrier AV-8B and F-16 VISTA

F-16 VISTA

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. A study has also been undertaken by the Royal Netherlands Air Force

Royal Netherlands Air Force

The Royal Netherlands Air Force , Dutch Koninklijke Luchtmacht , is the military aviation branch of the Netherlands Armed Forces. Its ancestor, the Luchtvaartafdeling of the Dutch Army was founded on 1 July 1913, with four pilots...

 using voice control in a F-16 simulator.

DVI systems may be "user-dependent" or "user-independent". User-dependent systems require a personal voice template to be created by the pilot which must then be loaded onto the aircraft before flight. User-independent systems do not require any personal voice template and will work with the voice of any user.