Guam Early Hearing Detection & Intervention Consultant Conducts Presentation for Guam Early Intervention System by Guam CEDDERS On November 17, Renee Koffend, Au.D., CCC-A, Audiologist and Guam Early Hearing Detection & Intervention (EHDI) Consultant, conducted a presentation on “Hearing Loss Identification and Rehabilitation” to Guam Early Intervention System (GEIS) service providers. The presentation included a review of the current Guam EHDI Hearing Screening and Diagnostic Audiological Evaluation (DAE). Guam Early Hearing Detection & Intervention