1-Hearing Aids, Harvey Dillon, 2012
2-Hearing Aids, Gerald R. Popelka
3-Modern Hearing Aids, Pre-fitting Testing and Selection Considerations, H. Gustav Muller
4-Principles of Hearing Aid Audiology, Second Edition, Maryanne Tate Maltby
5-Audiology Science to Practice, Steven Kramer - Hearing Aids Chapter 9 - H Gustav Mueller, Earl E. Johnson
6-Clinical Audilogy, An Introduction- Second Edition- Brad. A Stach- Chapter 13 Hearing Instruments
7-Audiology – The Fundamentals, Fourth Editions Fred. H. Bess
8-Handbook of Clinical Audiology- Jack Katz, Chapter 38-39-40-41