Reference Equivalent Threshold Values For Transducers - Interacoustics AT235 Instructions For Use Manual
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5.2 Reference equivalent threshold values for transducers
AT235 Maximums IMP
TDH39
Center
Reading
Freq.
Tone
NB
[Hz]
[dB HL] [dB HL] [dB HL] [dB HL] [dB HL]
125
80
65
250
100
85
500
120
100
750
120
105
1000
120
105
1500
120
105
2000
120
105
3000
120
105
4000
120
105
6000
120
100
8000
105
95
10000
WB
-
115
LP
-
120
HP
-
115
D-0128073-C – 2022/05
AT23 5 - Instructions for Use - US
DD65 v2
IP30
Reading
Reading
Tone
NB
Tone
85
70
100
100
85
110
110
95
115
115
100
120
115
100
120
115
100
120
115
95
120
115
100
120
110
95
120
100
85
105
95
80
90
-
115
-
-
115
-
-
115
-
IPSI
Reading
NB
Tone
NB
[dB HL]
[dB HL] [dB HL] [dB HL]
85
70
60
100
85
75
105
100
85
110
100
85
110
105
90
110
110
90
110
105
90
110
95
90
105
100
85
100
85
80
85
80
75
115
-
95
120
-
100
120
-
95
DD45
Reading
Tone
NB
[dB HL]
75
60
100
85
120
100
120
105
120
105
120
100
120
100
120
105
120
105
110
90
105
95
120
-
120
-
120
-
Page 51
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