Verifit
®
User's Guide Version 4.8
©
November 2016
11 WRECD measurement
The WRECD (Wideband Real-Ear to Coupler Difference) may be individually measured to improve the
accuracy of hearing aid fittings. The measurement procedure may be accessed by selecting WRECD from the
On-ear tests
list on the home menu or from the Audiometry poster within
Speechmap
.
Calibration of WRECD Transducer
WARNING:
Foam eartips are for single-patient use only
WARNING:
The WRECD transducer may be adversely affected if it comes in contact with a magnet. Do not
store where it may come in contact with any permanent magnet. If contact with a magnet is suspected,
transducer re-calibration is recommended prior to any patient measurements,
WRECD values are stored and expressed as referenced to the 0.4 cc wideband coupler. A calibration of the
Audioscan RECD transducer in this coupler is required at a minimum of weekly.
1. Connect the WRECD transducer to the WRECD jack on the Probe Dock. Prepare the system for test box
tests. See Microphone connection, Calibrating test box reference microphone.
2. Choose WRECD from the On-ear list on the home menu.
3. Select the RECD coupling method that will be used on the ear. Audioscan software supports both foam
eartips and personal earmold, however this choice must be made prior to measurement.
4. Attach the TRIC adapter to the 0.4cc coupler and attach this to the blue coupler microphone.
5. Insert the nozzle of the WRECD transducer all the way into the opening of the TRIC.
6. Click
. This causes a broadband signal to be applied to the WRECD transducer and the 0.4cc coupler
SPL to be recorded and displayed.
7. Select Interval to toggle the measurement interval for the coupler response between daily and weekly. If set
to weekly, RECD transducer calibration will expire at 12 AM Monday morning.
78
Summary of Contents for verifit
Page 1: ...Audioscan Verifit User s Guide 4 8 November 2016...
Page 17: ...Verifit User s Guide Version 4 8 November 2016 EC Declaration of Conformity 17...
Page 92: ...Verifit User s Guide Version 4 8 November 2016 92...
Page 94: ...Verifit User s Guide Version 4 8 November 2016 94...
Page 107: ...Verifit User s Guide Version 4 8 November 2016 Telecoil test results 107...
Page 123: ...Verifit User s Guide Version 4 8 November 2016 123...
Page 148: ...Verifit User s Guide Version 4 8 November 2016 148...
Page 149: ...Verifit User s Guide Version 4 8 November 2016 149...
Page 159: ...Verifit User s Guide Version 4 8 November 2016 159...