
U.S.
Patent
Jan.
30,
2007
Sheet
11
0f
13
US
7,170,404
B2
1005
/1o9
ALERT
SYSTEM
\
/
/\
108
CoDED
ALERTING
DEvICE
RECEIVING
SYSTEM
ALERT
MECHANISM
—'___—
COMMUNICATION
-
--
-
RECEIVING
1
10'\
MONITORING
PORT
SITE
MEANS
112’
/"\102
22
r
ALERT
K
/
DETERMINING
MEMORY
//\
109
MEANS
SIGNAL
/'\12O
DISTINGUISHING
//
TRIGGER
MEANS
/
__
114
f
/~
104
MESSAGE
121
PSEUDO
-
RANDOM
COFEAREEkQQNG
//
ACOUSTIC
CODE
GENERATOR
—-—-
116
r
/"\
TO
CRYSTAL
_
M|CROPROCESSOR
//
CONTROLLED
_
OSCILLATOR
ANALDG
TO
//1\12
DIGITAL
CoNvERTER
MEMORY
'
ins
DIGITAL
SIGNAL
//
14
PROCESSING
C
P
u
/
119
/
SPEAKER
>
1
>
1
)DD)
MICROPHONE
\
\
\~'106
8
SECONDARY
ALARM
117
/
F
I
I':—'1_
_-l_
2
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