82 The DSL/NAL-NL1 Module WinCHAP User’s Manual
6.6 Reference
This section describes all of the different settings available in the Settings window.
6.6.1 Understanding General Settings
• Hearing Aid Style: Select the hearing aid style affects the natural resonance
of the ear, and so compensations are made for style when calculating the cou
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pler prescription curves. Choose from BTE, CIC, ITC, ITE, and Body.
• Transducer: This selection specifies the transducer used in making the
audiometric measurements. It affects the HL to SPL transform, the targets,
and some of the other settings. See Table 6.6.1 for a listing of allowed set
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ting combinations. The RECD and HL to SPL settings referred to by the table
are located in the DSL settings tab. A selection of “Insert Custom Mold” will
require a measured RECD in order to generate coupler targets in the DSL win
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dow.
• Loud Speaker Orientation: This selection specifies the position of the loud
speaker used to obtain audiometric and real-ear sound field measurements.
We recommend using a 45 degree angle for most repeatable results.
• Show HL to SPL Transform in: This selection chooses whether to display the
SPL values in the tables of the Audiometry window as coupler SPL or real-ear
SPL.
• Compression Threshold: Choose from 40 dB to 65 dB. Your choice should
match the compression threshold of the hearing aid.
• Show Curve Symbols: Turn on or off the display of the numbers and symbols
identifying the displayed curves.
• Show Graph Lines: Turn on and off the display of the graph lines in the vari-
ous windows.
• Share DSL w/NAL Meas: Choose whether or not to make tests taken in the
DSL window be available in the NAL window.
• Share NAL w/DSL Meas: Choose whether or not to make tests taken in the
NAL window be available in the DSL window.
• Apply Corrections: Choose whether or not to correct the NAL and DSL dB
SPL targets to take into consideration the FONIX speech weighting. It is rec
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ommended to select Yes.
• PT Signal Mode: Select the type of signal used with pure-tone measurements.
The Fast selection does a quick, repeating pure-tone sweep that doesn’t stop
until you tell it to stop. The Normal selection does one full pure-tone sweep.
