Landmark Hearing Services

"I love what I hear!"
(58 Reviews)
Call: (408) 773-6862
877 W Fremont Ave Suite I-4 Sunnyvale, CA 94087

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Sandra Wendschlag

Dr. Sandra Wendschlag has been practicing Audiology since 1986. Prior to opening Landmark Hearing Services in 1997, she worked 11 years as an Audiologist for a large audiology group. She purchased one of their offices in 1997 and then again in 2017. Landmark Hearing Services now has 3 locations in the South Bay; Sunnyvale, Saratoga and San Jose (downtown Willow Glen). For their excellent service, they have received a 5* rating on YELP.
In 1986, she received her Masters degree in Audiology followed by earning her Doctorate degree through Arizona School of Health Science in 2003. As a licensed professional she continues her education hours staying at the cutting edge of the hearing care industry.
Consumer Business Review named Dr. Sandra, Sunnyvale's "Audiologist of the Year.” For her humanitarian interests she received the Bucharest Street Children's Project, "Hope Giver Award” and has traveled to Tanzania to provide hearing solutions using solar powered hearing devices. In addition, her office has donated $27,000 to build two water wells in Africa and has given over $11,000 to Help One Child – a local agency helping foster kids and caregivers. Since the beginning, her practice has been centered on professionalism, personal care and integrity.
Dr. Sandra is married and has three adult children.

Amy Nelson


For over 20 years Amy has been immersed in the field of audiology. Early in her career Amy was able to assist her grandfather with hearing devices and she's been helping others ever since. She's worked with patients of all ages across a wide spectrum of specialties including amplification, pediatrics, and vestibular assent. In her professional experience, Amy has served as an audiologist for 10 years with PAMF from 2003 to present with prior experience at clinics in Los Gatos and San Jose. 

Amy has a special passion in the area of tinnitus and provides assessment, counseling and management in tinnitus therapy. She's been certified with Tinnitus Practitioners Association and holds a membership with the American Tinnitus Association. Additionally, she's a resident consultant in the Palo Alto ATA, a sponsored support group.

She earned her BA in 1992 from San Jose State University in Communication Disorders and Sciences, and her Masters Degree in Audiology from San Jose State University in 1994. Following her postgraduate work Amy received her doctorate from Salus University George S. Osborne College of Audiology in 2009. She's also a Fellow Member of California Academy of Audiology and American Academy of Audiology.

Amy is a native of Sunnyvale, but she hasn’t stopped there. Over the years she and her husband have traveled the world from Europe and the Greek Isles to South America and Asia. Her taste for fine food is just as worldly with Mediterranean, Indian, and Thai topping her foodie list. When she’s not enjoying the outdoors bike riding with her son Cameron, her indoor passion is sitting with her two cats and scouring the latest fashion magazines. heidi (474x640).jpg

Heidi Nunez

Office Manager and Audiology Aide

Since 2008, Heidi has been an important member of Landmark Hearing Services. As the Office Manager and Audiology Assistant, she's responsible for office administration duties, credentialling  and assisting with our patient care. She has earned her Associates Degree in Medical Assisting and is a Registered Audiology Assistant. 

Heidi is happily married, cares for her younger brother and has a special fondness for aquatic turtles. During her free time she enjoys spending time with her family and loves to be outdoors hiking.

Clinic reviews

Read 58 verified patient reviews for Landmark Hearing Services! Their average review score is 4.98 () from 58 reviews.

Write a review

“Very nice people. Good service. Thank you. ”

of San Jose, CA   
Review received via mail
5 out of 5 1.


of San Jose, CA   
Review received via mail
5 out of 5 1.

“The test was excellent, and also, the excellent Dr. Nelson. The staff was kind and courteous. ”

of San Jose, CA   
Review received via mail
5 out of 5 1.

“I liked trying the hearing aids for a week before buying them and the helpful staff. ”

of Campbell, CA   
Review received via mail
5 out of 5 1.

“They have an excellent, professional approach. ”

of Sunnyvale, CA   
Review received via mail
5 out of 5 1.

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About this clinic

How well are you connecting with the sounds you love?

A child’s laughter, the vibrancy of music, leaves crunching underfoot, even a subtle joke – all the sounds that make life special.

At Landmark Hearing, we treasure the same sounds you do everyday. That’s why we’re dedicated to improve your hearing and to keep you saying, “I love what I hear.”

Love starts here with a tailored solution to improve your hearing range based on your personal preferences. And since hearing is believing, we encourage you to experience our product demonstrations from among the top device technologies to fit your lifestyle

Clinic services

We do it all for you

Loving what you hear begins with expertise. Your hearing solution is dependent upon the judgment, skill, and experience of our licensed professionals who will partner with you for one-to-one success.

Professional services:

  • Comprehensive, advanced hearing evaluations
  • Tinnitus and misophonia evaluation and treatment
  • Hearing device fitting with a 60-day trial period
  • Multiple hearing instrument brands
  • Complete follow-up care: cleaning, programming, counseling
  • Hearing device accessories for use with telephone, television, music, etc.
  • Custom made earplugs for musicians, swimmers and noise protection
  • On-site lab repairs

Call this clinic today!

(408) 773-6862

Hours of operation

Sunday Closed
Monday 9:00 am - 5:00 pm
Tuesday 9:00 am - 5:00 pm
Wednesday 9:00 am - 5:00 pm
Thursday 9:00 am - 5:00 pm
Friday 9:00 am - 2:00 pm
Saturday Closed

Accepted forms of payment

  • Visa
  • MasterCard
  • American Express
  • Cash
  • Check
  • Debit
  • Financial aid
  • Financing available for those who qualify
  • Insurance accepted, please call for details