Call Todaybr (562) 732-4713br br Visit Our Websitebr br Fidelity Hearing Center, Inc.br 13079 Artesia Boulevard, Ste B-104 Cerritos, CA 90703br br When you visit the hearing aid provider, one of the first things you will have to do is determine which hearing devices are the best fit for your needs. Phonak hearing aids are just one of the many choices you have. While your audiologist is the best person to help you make this determination, understanding a little about the features of the various devices on the market will help you make an informed choice.