AmpliVox 260 - A1.3 Recorded Speech Audiometry to Headphones

APPENDIX 1 - SPEECH AUDIOMETRY
30 MODEL 260 INSTRUCTION FOR USE
A1.3.2 Procedure:
As described in A1.1.2 except that the operator plays the recorded material to the subject.
A1.4 RECORDED SPEECH AUDIOMETRY TO HEADPHONES WITH CONTRALATERAL
MASKING
A1.4.1 Set Up - as described in A1.3.1 then:
a) Select MASK
b) Switch between INT (internal) and EXT (external) masking source by pressing the MASK key until the required
option is displayed in capitals; INT will be speech-weighted noise and EXT will be the competing noise from the
signal source
c) The masking noise is now routed to the opposite earphone to that selected
d) The MASKING  keys changes the masking level in 2.5dB or 5dB steps (depending on settings - see Section
3.4.2)
e) If required, readjustment of the input signal level can be accessed by pressing the MASK key to temporarily
deselect the masking function; proceed as in A1.1.1d) and when adjustment has been completed press the MASK
key to activate the appropriate masking noise
A1.4.2 Procedure:
As described in A1.3.2 but adjusting the masking level as required using the MASKING  keys.
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 repeatedly to ensure that ‘MIC’ is displayed in capitals at the bottom left of the display (indicating
that the external microphone is selected)
d) Press the FREEFIELD key
e) The external microphone is now routed to the external amplifier and speaker; use LEFT and RIGHT to select the
required amplifier channel
f) Continue from Section A1.1.1d) to Section A1.1.1g) above
A1.5.2 Procedure:
As described in A1.1.2.