Otoacoustic emissions are sounds measured in the ear canal that are elicited by activation of outer hair cells within the cochlea (inner ear). Now a common clinical procedure in audiology, OAEs are applied in the identification (screening) of auditory dysfunction in infants (newborn hearing screening), pre-school and school-age children, and even adults at risk for hearing loss (e.g., due to noise exposure or ototoxic drugs) and also in the diagnosis of auditory dysfunction. I've authored one book on the topic (Handbook of Otoacoustic Emissions) and coauthored with Dr. Sumitrajit Dhar another book (Otoacoustic Emissions: Principles, Protocols, and Procedures, 2011).
For a preview of the type of information in the available PPT presentations, you can read the following abstract and learning objectives.
Abstract: The session begins with a description of updated protocols for recording OAEs and systematic strategies for analysis of OAEs. Then, rationale for selected clinical applications of OAEs in children and adults is presented. Original research evidence is provided in support of each of these applications of OAEs. Finally, guidelines for implementing these clinical audiology services are offered.