Select phones: This option is only available if a secondary
headphone is enabled; use Softkeys 1 or 2 to
select the required headphone type
FF equiv speech?: This option is only available if either DD45 or
TDH39 is the selected headphone; if activated,
free-field equivalent levels will output to the
headphone in speech mode (see Appendix 1)
Store on 2 of 3?: Automatically stores a threshold if the responses
made to two out of three test signals are at the
same hearing level
Set freefield levels?: This option provides access to the freefield
calibration function; refer to Appendix 2 for details
External talkover?: Select NO to use the internal microphone and
YES to use the MIC 1 input
Display Counter?: Activates a percentage counter for use with
speech testing (refer to Appendix 1)
Select printer: Use the appropriate softkey to select either the
Able (AP1300) or the Martel (MCP8830) printer or
the Sanibel (MPT-II) printer
Omit 750/1k5/3k/6k?: To exclude these frequencies from those
available for testing press the YES key
Present Time: Select the minimum and maximum times that a
stimulus can sound when the PRESENT key is
pressed; either 0.5sec (min) & 10sec (max), or
1.0 sec (min) & 2.0 sec (max)
FF Speech units: The units displayed for freefield speech may be
switched between dBHL and dBSPL
3.5.3 Description of Function of Other Keys
SIGNAL HL The rotary control is used to increase or decrease the
signal level in the selected step size.
To Next Page
Loading...
