AmpliVox 260 - A1.8 Free Field Recorded Speech Audiometry With Competing Noise (Recorded)

Page 32 OM023-4 Amplivox 260 Operating Manual
d) The level of competing noise is adjusted using the MASKING 
keys in 2.5dB or 5dB steps (depending on settings - see Section
3.4.2)
A1.7.2 Procedure:
As described in A1.3.2 but adjusting the competing noise level as
required.
A1.8 Free Field Recorded Speech Audiometry With Competing
Noise (Recorded)
A1.8.1 Set Up: as described in A1.7.1 except:
a) Ensure that EXT is displayed in capitals indicating that competing
noise from the signal source is selected; if necessary press the MASK
key until EXT is displayed in capitals
b) Competing noise from the signal source is routed to the competing
LINE OUT channel
c) Use the SIGNAL  keys to adjust the signal channel and the
MASKING  keys to adjust the noise channel
A1.8.2 Procedure:
As described in A1.3.2 but adjusting the competing noise level as
required.