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3. Recorded Speech Audiometry to Headphones
3.1 Set Up
f Connect a CD, tape player, or other sound source to the LINE IN
jack socket; refer to Section 2.7 of this operating manual.
f Press SPEECH and use Softkey 1 to ensure that ‘LINE’ is displayed
in capitals (indicating that the line input is selected).
f The line input is initially routed to the left earphone. To select the
right earphone press RIGHT.
f The input signal is adjusted in 1dB steps by use of the MASK
rotary control.
f Play the 1kHz calibration tone on the recorded material and
adjust the input signal such that the LEVEL dB bar graph
reads 0dB; the headphone output measured in an IEC 318
ear simulator will now be 89dBSPL for a setting of 70 dBHL.
f The output level is controlled in 5dB steps by the SIGNAL control.
3.2 Procedure
As described in 1.2 except that the operator plays the recorded
material to the subject.
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