39
Section 1: Coupler Tests of FM Systems
1.6.7 Test aid with high-level input — EHA90
1.
Set up the hearing aid for testing in the sound field by following the directions
found in the hearing aid setup in Section 1.4.1. If you’ve already leveled the sound
field speaker, you can skip to step 6 in that section.
2.
Press [MENU] to enter the SPL Menu.
3.
Select PURE TONE for AIDED CURVE 1, AIDED CURVE 2, and AIDED CURVE 3.
4.
Press [MENU] to return to the SPL Test Screen.
5. Press
[
∧
] to select CRV 1.
6. Use [>] to select a source level of 90 dB SPL.
7.
Press [START/STOP] to begin the sweep.
8.
This response will be referred to as the Electroacoustic Hearing Aid Saturation
Response or EHA90. See Figure 1.6.7.
Figure 1.6.7
EHA90—the hearing aid response at 90 dB SPL
