D-0120578-C – 2019/11
Eclipse – Instructions for Use - US
Page 111
8.8.8 Stopping a test frequency/intensity
Right click within the desired Test Frequency Graph to Stop the Current Ongoing Intensity Immediately.
8.8.9 ASSR masking calculator
In cases of unilateral or asymmetric hearing loss, masking the non-test ear is usually necessary to prevent
cross-hearing.
Deciding whether masking is necessary and if so, calculating the level of masking noise and the risk of
cross-masking require several equations. These become more complex for new borns and it is not realistic to
compute them manually in the midst of a clinical session.
! Disclaimer – Interacoustics has produced this utility to aid testers but can accept no responsibility for
errors or inappropriate use.
This ASSR masking calculator is not a part of the Eclipse device and user should use his own judgement
when performing tests on patients, and the user must carry clinical responsibility for any decision made.
The ASSR masking noise calculator is an Excel based spreadsheet (so can be run on a PC, laptop or tablet)
into which the clinician enters basic data (test frequency & level, transducer type etc). The calculator
indicates the need for masking, its level and whether cross-masking is likely.
It is a development of the ABR masking noise calculator. With ABR, other strategies are available e.g.
inspecting the two recording channels for differences which suggest which ear is generating the ABR.
Inspecting the waveforms is not appropriate for ASSR, making the ASSR masking noise calculator a
particularly valuable tool.
An ASSR masking calculator has been developed in collaboration with Dr. Guy Lightfoot. You can find it
under ‘Guides and instructions’ (see below):
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