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

Pressure spot if tubing is too short Pressure spots Figure 11.1 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

Compression ratio variation Input Output Input Output Figure 11.2 Variation of the I-O curve as the compression ratio control is varied for two different hearing aids. Source: Dillon (2001): Hearing Aids

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

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

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