Specifications

MIL-STD-1472E

5,3 Audio dimkws.

5.3.1 General.

5.3,1.1 ~. Audio displays should be provided under the following conditions:

a. The information to be processed is short, simple, and transitory, requiring an immediate or

time-based response.

The common mode of visual display is restricted by over-burdening; ambient light

variability or limitation; operator mobility; degradation of vision by vibration, high g-forces,

hypoxi~ or other environmental considerations; or anticipated operator inattention.

c. The criticality of transmission response makes supplementary or redundant notification

desirable.

d. It is desimble to wnrn, aim or cue the opemtor to subsequent additional response.

e. Custom or usage has mated anticipation of an audio display,

f. Voice communication is necessary or

desirable.

5.3.1.2 Si@ tMM. When an audio presentation is rquired, the optimum type of signal should

be presented in aecordatw with the Table V.

5.3.1.3 False alarms. The design of audio display deviees and circuits shall preclude false

alarms.

5.3.1.4 Faikm The audio display deviee and circuit shall be designed to preclude warning

signal failure in the event of system or quipment failure and vice versa.

5.3.1.5 Cimuit test, All audio dispAaysshall be equipped with circuit tcstdeviees or other means

of operability test.

5.3.1.6 Aircrew stations. Audio signals for air crew stations shall conform toMIIATD-411,

where applicable.

5.3.1.7 Use with several visual disdavs. If immedate dkximbu

“onis not critical to personnel

safety or system perfomanec, one audio signal may be used in conjunction with severs! visual

displays.

5.3.2 Audio warnkm

5.3.2.1 Warnimz simils. Signals should be provided to warn pcxsonnel of impending danger,

to alert an operator to a titicai change in system or equipment status, and to remind an operator of a

critical action or ackns that mW be taken. An Amingkamkg eignal shall provide the OpOratmwith

~seater p~babiliu of detecting thc ~mring Condition than normal observation would provide in the

absence of the signal. NOTE: Certain audio signals have been standardized for aircraft use by joint

scrvicc and irx.ernational agmzmcnt. Aadiu sqpds for futureaircrah design shoutd corrhrm to them

figrccmcnts (see MIL-STD-41 1),