A1.4.2 Procedure:
As described in A1.3.2 but adjusting the masking level as required.
IMPORTANT NOTES – FREE FIELD MODES
For the following Free Field modes of operation it is essential for the Free
Field calibration procedure described in Appendix 2 of this operating
manual to have been performed. This aspect may also be subject to local
requirements or legislation.
A1.5 Free Field Live Voice Speech Audiometry
A1.5.1 Set Up:
a) Connect an external amplifier/speaker to the LINE OUT jack socket;
refer to Section 2.7 of this operating manual
b) Connect a microphone to the MIC1 input on the audiometer
c) Press SPEECH & FREEFIELD and use Softkey 1 to ensure that ‘MIC’
is displayed in capitals (indicating that the external microphone is
selected)
d) The external microphone is now routed to the external amplifier and
speaker; use LEFT and RIGHT to select the required amplifier
channel
e) Continue from Section A1.1.1d) to Section A1.1.1f) above
A1.5.2 Procedure:
As described in A1.1.2.
A1.6 Free Field Recorded Speech Audiometry
A1.6.1 Set Up:
a) Connect an external amplifier/speaker to the LINE OUT jack socket,
and a CD, tape player, or other sound source to the LINE IN jack
socket; refer to Section 2.7 of this operating manual
b) Press SPEECH & FREE FIELD and use Softkey 1 to ensure that
‘LINE’ is displayed in capitals (indicating that the line input is selected)
c) The line input is now routed to the external amplifier and speaker; use
LEFT and RIGHT to select the required amplifier channel
d) Play the 1kHz calibration tone on the recorded material and follow the
calibration procedure in Appendix 2
e) The input signal is adjusted in 1dB steps by use of the MASK control
f) Adjust the input signal such that the LEVEL dB bar graph reads 0dB
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