• Skip to primary navigation
  • Skip to main content
  • Skip to primary sidebar
  • Skip to footer
Contact | 360-778-1266

Hearing Loss Help Store View Cart | Check Out

Center for Hearing Loss Help

Help for your hearing loss, tinnitus and other ear conditions

  • Home
  • About Us
  • Contact
  • Reference
    • Glossary of Ear Terms
    • Drug Pronunciation Guide
    • Looping Information
    • “Learn About Hearing”
    • Useful Links
  • Museum
  • Blog
  • Shop
    • Books
    • Visor Cards

Fitting Hearing Aids Properly—Real Ear Measurements (REM) vs. Real Ear to Coupler Difference (RECD)

by Neil Bauman, Ph.D.

A man explained,

Austin TX is a large and sophisticated city, but I haven’t been able to find a single hearing aid dispenser who has the equipment for using real ear speech mapping. My readings tell me that speech mapping is the one essential thing I should do when buying new hearing aids but it seems unavailable here.

The last audiologist I talked to said that certain models of hearing aids now have circuits that do the same job as the traditional probe and collar for mapping. If so, I assume the audiologist would need to have the proprietary software (and coupler?) for that brand of hearing aid. In researching online I’ve come across implied references to a Siemens model and the Starkey S series and Starkey Zon, but no actual solid information.

My question: do you know whether there are BTE models that have the circuitry for doing the same job as the traditional real ear speech mapping?

Unfortunately, what you have found is true all over the country. Real ear testing is not being done like it should be. Since it is part of the code of “best practices” for audiologists, you’d think all audiologists would be using it in order to give their clients the best possible hearing aid fitting. If audiologists won’t follow their best practices, it should not be surprising that hearing aid dispensers, as opposed to audiologists, are even less likely than audiologists to do real-ear testing.

Real ear testing is important to knowing whether the fitting is truly matching your hearing loss or not.

Now, to answer your question about hearing aids doing the same job as real ear testing, since I’m no expert on this, I asked one prominent audiologist, who is a proponent of real ear testing, what his thoughts were on the subject.

He replied:

There is some truth in what the writer says indirectly. The major manufacturers are getting much closer to prescribed targets with their first fits. They are also getting clever and seem to be using the speaker as a microphone to do an estimated RECD (Real Ear to Coupler Difference). While this isn’t actually ANSI standard real ear measurement, it does make a very good attempt to take ear canal acoustics into account. You will not find much, if any, documentation on these techniques as they fall into the realm of “trade secrets”.

Ideally, more hearing aid fitters should use independent probe microphone measurements [real ear testing] and speech mapping, but since that is not the case, the manufacturers are implementing ways to improve fittings and decrease the number of returns for credit.

Thus, it appears that real ear testing is still the best way to know your hearing aids match your hearing needs, but if you can’t find someone in your area that does real ear testing, then your next best alternative is to be fitted by someone that uses RECD.

Reader Interactions

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

Primary Sidebar

Hearing Loss Research & Resources

Free Visor Cards

Download your free Visor Cards for hard of hearing or deaf people here.

Loop Systems

Loop your home or meeting room. Discover how you can hear wonderfully clear sound again when listening to the TV/radio, etc, or when listening to a speaker at a meeting.

Loop systems are one of the best-kept secrets in town. To learn more about Loop Systems and what they can do for you, click here.

Take Control of Your Tinnitus—Here’s How

If your ears ring, buzz, chirp, hiss, click or roar, you know just how annoying tinnitus can be. You do not have to put up with this racket for the rest of your life. This book teaches you many things you can do to help bring your tinnitus under your control so it no longer bothers you.

Learn More | Add to Cart—Printed | Add to Cart—eBook

Sounds Now Too Loud for You?

Hypersensitive to Sound front coverIf some (or all) normal sounds seem so loud they “blow the top of your head off”, or make you wince or jump, or cause you headaches or ear pain, or affect your balance, or result in fear or annoyance of sounds so you feel you have to avoid these sounds, this book is for you!

Learn More | Add to Cart—Printed | Add to Cart—eBook

Hearing Phantom Sounds?

When hard of hearing people begin hearing phantom voices or music, they immediately worry they are going crazy. It never crosses their minds that they are sane and are just experiencing Musical Ear syndrome.

To learn more about the strange phantom sounds of Musical Ear syndrome and what you can do about them, click here to read a comprehensive article about Musical Ear Syndrome.

Or get the book—Learn More | Add to Cart—Printed | Add to Cart—eBook

Glossary Navigation

  • Full List of Glossary Terms
  • A to Z Index

Footer

Center for Hearing Loss Help

Neil G. Bauman, Ph.D.

1013 Ridgeway Drive, Lynden,
WA 98264-1057 USA

Email: neil@hearinglosshelp.com

Phone: 360-778-1266 (M-F 9:00 AM-5:00 PM PST)

© 2025 Center for Hearing Loss Help – Help for your hearing loss, tinnitus and other ear conditions

"The wages of sin is death, but the gift of God is eternal life [which also includes perfect hearing] through Jesus Christ our Lord." [Romans 6:23]

"But know this, in the last days perilous times will come" [2 Timothy 3:1]. "For there will be famines, pestilences, and [severe] earthquakes in various places" [Matthew 24:7], "distress of nations, the sea and the waves roaring"—tsunamis, hurricanes—Luke 21:25, but this is good news if you have put your trust in the Lord Jesus Christ, for "when these things begin to happen, lift up your heads [and rejoice] because your redemption draws near" [Luke 21:28].