Specifications
MIL-STD- 1472E
TABLEV. Functional evaluation of audio signals
.
.
!4
Q
TYPEOF SIGNAL
FU?WITON
TONES COMPLEX SOUNDS
SPEECH
(F&kdic)
(Non-Periodic)
—
QU/WIl’TATfVE
POOR
POOR GOOD
INDICATION
Maximum of 5 to 6 tones
interpolation between
Minimum time anderror
in
absolutely recognizable
signals inaccurate.
obtaining exact value in terms
=JP@ti* Withrespome.
QUALITATIVE
POOR-TO-FAIR
POOR GOOD
INDICATION
Difficult to judge approx- Difficult to judge
Information concerting
imatevalueand direction
approximate &vition dkpkaen
Ldiractiom
ofdeviation fromnull
fromdesiredvalue.
setting unless presentd
~-pdbfm
in close temporal sequence.
-w with required
response.
STATUS
GOOD GOOD
POOR
INDICATION
Start and stop timing. Especially suitable for
Ineffkient; more easily
Continuous information
irregularly occurring signals
~:ji.jbkm of
where rate of chmge of
1
(e.g., alarm signals).
input is low.
TRACKING
~
POOR
GQQQ
Null position easily
Requixxxtqualitative
Meaning intrinsic
in signal.
monitored; problem of
indications difficult to
signak3aponSe
provide.
, compatibility
GENERAL
Good for automatic
Some sounds available
Most effeetive for rapid (but not
communication of
limited
with common meaning
automatic) eorttmtmieation of
information. Meaning
(e.g., fire bell). Easily
compkx, multidimensional
must be learned.
Easily
genelatd.
information. Meaning intrinsic
generated.
in signal and eontcxt when
stankiid. Minimum of new
--
5.3.2.2.1 Two element simtals. when reaction time is critical and a two element signal is
necessary, an alerting signal of 0.5 second duration shall be provided. All essential information shall
&~n._ti*fim2.O~&**i~m*ti&.
5.3.2.2.2 SingJe,elcment sigryd. When reaction time is critical, signals shall be short, lf a
——..
single element signal is permissible, all essenrxatinformation shali be transmitted m the tirst 0.5
JCCm!.
s I ? ? ~;lll[ioll ~ion;]ls C’alj(ion signals shall hc readily distinguishable from warning yignal~
and
shall he Iiscd to indicate conditions requiring awmmess, but not necessarily immediate itchon.
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