Since the advent of modern digital hearing aids, we have gradually forgotten the exciting laws of acoustics and how they apply to hearing aid earmolds. While many things can be accomplished digitally, acoustical modifications can still be the preferred approach, especially when it comes to battery life of headroom maintenance. This talk will discuss the derivation of the use of acoustic formulae to improve hearing aid fittings, explain some unusual conductive configurations, and make you the hit of the party.

Learning Objectives:
1. Learn the formulae necessary for understanding acoustical modifications in modern hearing aids.
2. Learn how to modify the response of some poorly fit hearing aids.
3. Learn why unusual audiometric conductive configurations can occur.