1. Figures for Chapter 11 Trouble-shooting and fine-tuning
Dillon (2001)
Hearing Aids

2. Pressure spot if tubing is too short
Pressure spots
Figure Excessive pressure caused by earmold tubing being cut too short or too long.
Pressure spot if tubing is too long
Source: Dillon (2001): Hearing Aids

3. Compression ratio variation
Input
Output
Input
Output
Figure Variation of the I-O curve as the compression ratio control is varied for two different hearing aids.
Source: Dillon (2001): Hearing Aids

4. Rating scales
Figure 11.3 Two response scales used for obtaining absolute ratings of sound quality.
Source: Dillon (2001): Hearing Aids

5. Tournament strategy 1 2 4 3 5 6 7 8 2 3 5 7 3 7 3
Figure 11.4 A tournament strategy for eight responses, with response number 3 being the eventual winner.
Source: Dillon (2001): Hearing Aids

6. Adaptive worksheet
Trial 30 40 50 60 70 1 2 3 4 5 6 7 8 9 10
Figure 11.5 Worksheet for adaptive paired comparisons of different compression thresholds. Circles show the winner of each trial, and crosses mark the reversals.
Source: Dillon (2001): Hearing Aids