51
Character
Number of
Data
Field Name
Field Description
Number
Characters Type
11
2
uChar Ear
Ear under test
Bit 0=1=Left ear under test
=0=Left ear not under test
Bit 1=1=Right ear under test
=0=Right ear not under test
Bits 2-7=Not used
Either the RIGHT ear is selected OR
the LEFT ear is selected. Both ears
selected or no ear selected is invalid.
13
4
slnt
HL Threshold -10 to +100 dB HL x 2
125 Hz
NR=Any value in the range of 231
to 450
NT=32,768 (0x8000 Hexadecimal)
:
:
:
:
:
53
4
slnt
HL Threshold -10 to +100 dB HL x 2
8000 Hz
NR=Any value in the range of 231
to 450
NT=32,768 (0x8000) Hexadecimal)
57
2
uChar Checksum
The hexadecimal sum of
characters 1 to 56
59
2
ASCII
Package
“CR”, “LF”
Terminator
5.3.4 Notes
1) “uChar” & “sChar” designate unsigned and signed characters
respectively, single bytes represented in Hexadecimal by two
ASCII characters.
Example:
0xE9 is sent as: “E”, “9”
2) “ulnt” and “slnt” designated unsigned and signed 16-bit integers
respectively, expressed in HiByte / LowByte sequence by four
Hex ASCII characters.
Example:
0xE196 is sent as: “E”, “1”, “9”, “6”
3) Tympanometry compliance values are stored in the record scaled
by 64. To convert to cm3, divide by 64.
Example:
Tymp Data [0]=“4”, “2” = 0x42=66 decimal
scaled X 64=66 / 64=1.03 cm3
4) Reflex compliance values are stored in the record scaled by 256:
To convert to cm3, divide by 256.
Example:
Reflex #1 Reflex [0]=“0”, “3”, “0”, “D”=0x30D
=781 decimal scaled X 256=781 / 256=3.051 cm3
5) Audiometry Threshold values are stored scaled by 2 in the
sequence of 125 Hz, 250, 500, 750, 1000 \, 1500, 2000, 3000,
4000, 6000 and 8000 Hz.
Example:
HL Threshold 125 Hz=“0”, “0”, “9”, “6”=0x96
=150 decimal scaled x 2=150 / 2=75 dB HL.
