PRESCRIBING HEARING AID AMPLIFICATION

10.1 GENERAL CONCEPTS BEHIND A PRESCRIPTIVE APPROACH AND A BRIEF HISTORY

10.2 GAIN AND FREQUENCY RESPONSE PRESCRIPTION FOR LINEAR AMPLIFICATION

10.2.1 POGO
10.2.2 NAL
10.2.3 DSL
10.2.4 Examples and comparisons: POGO II, NAL-RP and DSL

10.3 DIFFICULT ISSUES IN PRESCRIPTION

10.3.1 Acclimatization and adaptation to gain and frequency response
10.3.2 Preferred loudness
10.3.3 Dead regions
10.3.4 Severe hearing loss, effective audibility and high frequency amplification
10.3.5 Prescribing compression thresholds
10.3.6 Need for accuracy in prescription

10.4 GAIN, FREQUENCY RESPONSE, AND INPUT-OUTPUT FUNCTIONS FOR NON-LINEAR AMPLIFICATION

10.4.1 LGOB
10.4.2 IHAFF/Contour
10.4.3 ScalAdapt
10.4.4 FIG6
10.4.5 DSL [i/o] and DSLm[i/o]
10.4.6 NAL-NL1 and NAL-NL2
10.4.7 CAMREST, CAMEQ and CAMEQ2-HF
10.4.8 Comparison of procedures

10.5 ALLOWING FOR CONDUCTIVE AND MIXED HEARING LOSSES

10.6 SELECTING OPTIONS FOR MULTI-MEMORY HEARING AIDS

10.6.1 Music programs
10.6.2 Candidates for multi-memory hearing aids

10.7 PRESCRIBING OSPL90

10.7.1 General principles: avoiding discomfort, damage and distortion
10.7.2 Type of limiting: compression or peak clipping
10.7.3 OSPL90 prescription procedures
10.7.4 Prescribing OSPL90 at different frequencies
10.7.5 OSPL90 for non-linear hearing aids
10.7.6 OSPL90 for conductive and mixed losses

10.8 EXCESSIVE AMPLIFICATION AND SUBSEQUENT HEARING LOSS

10.9 CONCLUDING COMMENTS