GSi 61 - Page 39

Chapter 2 - Installation
It is an option to include high frequency audiometry
on the GSI 61. The High Frequency earphones are
connected to stereo cable extensions which, in turn, are
connected into the Right and Left phone jacks on the
rear panel. When the High Frequency option is installed,
connect the standard TDH 50P earphone cords into the
stereo cable extensions labeled Std. The following two
figures show the installation of the High Frequency and
THD 50P earphones. When the Sennheiser High
Frequency phones are used and the High Frequency
option is enabled, the frequencies available for testing
are 8 kHz, 9 kHz, 10 kHz, 11.2 kHz, 12.5 kHz, 14 kHz,
16 kHz, 18 kHz and 20 kHz. The intensity range is
from -20 dB to 110 dB HL. High Frequency audiometry can also be performed in
Sound Field using the Basic Speakers configuration. In High Frequency Sound Field,
the frequencies of 8 kHz, 9 kHz, 10 kHz, 11.2 kHz, 12.5 kHz, 14 kHz, 16 kHz are
available.
TDH-50 Low
Frequency
Phones
Sennheiser
High Freq.
Phones
High Frequency Option Setup: No Sound Booth
TDH-50 Low
Frequency
Phones
Sennheiser
High Freq.
Phones
High Frequency Option Setup: With Sound Booth
2-23
High Frequency
1761-0100 Rev. B