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Speech Noise
White Noise
External CD
Talk Forward
Headphones
Insert Phones
Bone
Sound field
Monitor
D-0131088 Rev C, 2022-07
GSI AudioStar Pro Instructions for Use
Air Conduction: -10 dB HL to 95 dB HL (DD45)
Bone Conduction: -10 dB HL to 50 dB HL
(mastoid B81), -10 dB HL to 40 dB HL (forehead
B81)
Sound Field: -10 dB HL to 85 dB HL
Frequency Range: Equal energy per frequency
100 to 1,000 Hz with a 12 dB/octave roll-off from
1,000 to 6,000 Hz
Air Conduction: -10 dB HL to 95 dB HL (DD45)
Bone Conduction: -10 dB HL to 60 dB HL
(mastoid B81), -10 dB HL to 50 dB HL (forehead
B81)
Sound Field
Frequency Range: 125 Hz to 12,000 Hz with
constant bandwidth
Input Specification
7 mV RMS at max. gain for 0 dB reading; input
impedance 47 kOhm
100 uV RMS at max. gain for 0dB reading; input
impedance 3.2 kOhm
Output Specification
7 V RMS at 10 Ohm load; 60-20,000 Hz -3 dB
7 V RMS at 10 Ohm load; 60-20,000 Hz -3 dB
7 V RMS at 10 Ohm load; 60-20,000 Hz -3 dB
7 V RMS at min. 2 kOhm load; 60-20,000 kHz -3
dB
2x 3 V RMS at 32 Ohm/1.5 V RMS at 8 Ohm load;
60-20,000Hz -3dB
Free Field Specification
-10 dB HL to 80 dB HL
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