1.4 OUTPUT HEARING LEVEL CONTROL
CALIBRATED
HL
MEASURED IN INCREMENTS OF 5 dB
RANGES
125
Hz -10 to
50
dB HL
500 to
6000
Hz -10 to 90 dB HL
250 and 8000 Hz -10 to 70 dB HL
Additionally A "+10 dB" Extended Range Switch, which extends
maximum HL at all frequencies by 10 dB.
ACCURACY
ALL SETTINGS OF HEARING LEVEL CONTROL:
125 to 4000 Hz
dB
6000 to 8000 Hz
dB
1.5 SIGNAL TO NOISE RATIO (IN 1/3 OCTAVE)
>70
dB measured acoustically in dB HL
1.6 TONE SWITCH
This electronic switch turns the stimulus signal ON/OFF with
minimal audible distortion.
MODES
Normal State:
Activated State:
Stimulus OFF
Stimulus ON
RISE/FALL TIME
20-50
ms
Measured at the -1 dB and -20 dB points on the signal envelope.
ON/OFF RAT
IO
With the Tone Switch OFF,
the output will be at least -10 dB
below standard reference equivalent threshold for any 1/3
octave
band with HL setting of 60 dB or below.
ABOVE 60 dB HL SETTING
>70
dB
CROSS CHANNEL LEAKAGE
At HL settings of 70 dB or greater,
unwanted signals in the non-
test earphone shall be at least 70 dB below the tone in the test
earphone.
Summary of Contents for Grason-Stadler GSI 17 1717-9700
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