About Us

Ko’olau Audiology and Hearing Aid Services was formed by Peggy Failla and Terilyn Wong on April 1, 2010 to provide hearing assessment and rehabilitation along with hearing aid dispensing by licensed, professional audiologists on the windward side of Oahu.

Both Peggy and Teri are raising their families on the windward side of Oahu, taking time to enjoy community and school activities, picnics, and walks on the beach, even while meeting the needs of their valued patients.

Professional Staff

Peggy Failla, MA, CCC-A

Peggy Failla, MA, CCC-A

Peggy Failla, MA, CCC-A

University of Tennessee/Knoxville, 1977

Peggy Failla brings her expertise from working at the Emory University Clinic in Atlanta. As a Board Certified Audiologist, she has provided hearing testing and hearing aid fittings through various clinics, Ear, Nose and Throat physician offices, and educational settings. Peggy later started the Audiology Department at Castle Medical Center, where she worked for 15 years as head of the department.


Terilyn Wong, MA, CCC-A

Terilyn Wong, MA, CCC-A

Terilyn Wong, MA, CCC-A

Ohio University, 1986

Terilyn Wong brings over 25 years of experience as a Board Certified Audiologist, providing hearing evaluations and the fitting and dispensing of hearing aids to communities across Oahu. She has worked in private medical and audiological practices and was a clinical supervisor in the University of Hawaii’s Audiology program.

Your Goals Are Our Goals

We promise to work closely with you to discover where you are having the most difficulty communicating. Then, we will collaborate with you to determine the best solution to increase your ability to hear and understand in the situations you describe. If that solution includes hearing aids, then we are committed to recommending the technology that:

  1. Works best for your level of hearing loss;
  2. Complements your lifestyle and,
  3. Fits within your budget. Your satisfaction is our ultimate goal.

Continuing Education

Although we’re smart enough to know that we don’t know everything, we’re dedicated enough to try!  To make sure we stay on top of both the latest advances in technology and the current research related to hearing we attend many conferences, seminars and conventions every year.  In addition we belong to a variety of professional organizations that provide us with a wealth of information.