1. Figures for Chapter 10 Hearing Aid Selection Dillon (2001) Hearing Aids

2. 6. Evaluate likely fit to prescription target 5. Select a potential hearing aid4. Select earmold options if offered7. Order chosen hearing aid9. Program hearing aid8. Retrieve client data10. Measure response in the patient’s ear 1. Put audiometric data into programming tool 2. Open software from potential manufacturer 3. Select fitting method if offered Evaluate patient’s reaction to the fitting 11. Adjust hearing aid settings to meet prescription 12. Re-measure response in the patient’s ear Figure 10.1 Twelve steps for selecting programmable hearing aids. Source: Dillon (2001): Hearing Aids

3. 5. Select a hearing aid4. Calculate coupler prescription6. Revise the earmold selection7. Order chosen hearing aid1. Select a prescription procedure2. Calculate real-ear prescription target3. Choose earmold or earshell options8. Fit hearing aid9. Measure response in the patient’s ear Evaluate patient’s reaction to the fitting 10. Adjust hearing aid settings to meet real ear prescription 11. Re-measure response in the patient’s ear Figure 10.2 Eleven steps for selecting non-programmable hearing aids. Source: Dillon (2001): Hearing Aids

4. Probe microphone (d) Figure 10.3 Measurement of RECD using a real ear analyser, insert phones, and a probe microphone. For ITEs, the insert phone is connected via foam plugs to (a) a HA1 coupler, and (b) the patient’s ear. For BTEs, the insert phone is connected to (c) a HA2 coupler by 25 mm of tubing, and (d) the patient’s ear by the individual earmold and tubing. For both measurement types, a hearing aid receiver in a BTE hearing aid case can be used instead of the ER3A earphone if desired. (c) HA2 25 RECD Measurement Source: Dillon (2001): Hearing Aids (a) HA1 ER3A Real Ear Analyser Probe microphone (b)