Meet Our Staff


Therese M. Kistenfeger, Au.D, CCC-A

Dr. Therese Kistenfeger earned her Doctorate in Audiology at the University of Memphis in 2011 and her Bachelors of Science in Special Education (Deaf and Hard of Hearing) from Illinois State University in 2003. Dr. Kistenfeger is a licensed audiologist in the state of Illinois and is certified through the American Speech Language and Hearing Association (ASHA).

Dr. Kistenfeger specializes in pediatric and adult diagnostics, including hearing evaluations and auditory evoked potentials, as well as fitting hearing aids. Dr. Kistenfeger shows expertise in the selection and fitting of the latest digital hearing aid technology. She has a goal and hope for every patient that she is able to properly educate and work as a team with each patient to help them hear better in hopes that life becomes more enjoyable with improved ease of communication.


Londa Willenborg, Office Manager

Londa currently works for AOD Hearing Aid Center, and has been the Office Manager for 20 years, in Decatur Illinois. Londa went to school to become a medical assistant. She then decided to become an Audiologist Assistant. Londa has had the privilege of working with several hearing aid companies to learn hands on repairs, and new styles and technology that are available.

Londa has been an Audiologist Assistant for 15 years, and she has had the privilege of only working with Audiologists. That inspired her to become an assistant. Londa enjoys working with the public, and watching them get an experience out of hearing with hearing aid(s).

Londa’s goal is to always succeed in what she does, to be kind, and help others.

Londa loves camping, boating, and traveling with her husband, friends, and family.

Steven M. Sobol M.D.