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HEADSET MANAGEMENT
The ES3 supports both a Primary and a Secondary headset, and either headset
may be a Telephonics TDH-39 (60-Ω) or an E·A·R Auditory Systems E·A·RTONE
5A (50-Ω) (referred to as EAR-5A).
Note! Primary and Secondary may denote headsets of different types
or headsets of the same type (e.g., two TDH-39 or two EAR-5A
headsets).
When the ES3 is equipped with only one headset, this should be indicated by
selecting “None” for the secondary headset type via the menu sequence ⌐S
ETUP
⌐GENERAL ⌐PERFORM CALIBRATION (password) ⌐CALIBRATE SECONDARY ⌐HEADSET
TYPE {NONE}. ES3’s ordered with a single headset with have this setting by default.
When two different headsets are available, the headset being used for audiometric
testing must be correctly specified to ensure that the correct calibration values are
applied. If the primary and secondary headsets are of the same type (e.g., two
sets of TDH-39 or two sets of EAR-5A) it is still important to keep track of which
headset is designated as the Primary one and which as the Secondary one, since
different earphones, even of the same type, will likely have different transducer
correction values. Specification of the headset to be used for testing is done via
the menu sequence ⌐S
ETUP ⌐GENERAL ⌐HEADSET FOR TESTING
{Primary/Secondary}. If only one headset is equipped, “Primary” will be the only
choice displayed.
Caution: When specifying Primary/Secondary headset for calibration
or TDH-39/EAR-5A headset type to be used for testing, the selection
MUST MATCH the headset that is actually attached to the ES3.
Special hex screws are used to attach the headset cable to the ES3. Use of these
screws serves as a reminder that headset assemblies should not be casually
exchanged. Insert phones attach to the cable via plug-in connectors, so it is the
responsibility of the user to insure that Right and Left phones are not switched and
that the correct phones are attached.
Calibration mode must be accessed to calibrate the earphones, to specify Primary
and Secondary headset types, and to change the calibration date. Calibration
mode is password protected to minimize the risk of inadvertent changes (e.g.,
while ‘browsing’ through menus). Please see the ES3 Calibration Guide for more
detailed information regarding headset management and calibration.
Specification of headset type should only be done during calibration (i.e., when
selecting which type of earphone is being calibrated). Specification of the Primary
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