AudiologyOnline Phone: 800-753-2160


ReSound ONE with M&RIE - April 2021

How does DFS Ultra Feedback Cancellation Affect Telephone Use?

Robin C. Donham, AuD, FAAA, CCC-A

November 5, 2012

Share:

Question

When a patient is using the telephone and DFS Ultra reduces gain to avoid feedback, will it degrade the patient’s ability to understand?

Answer

DFS Ultra is ReSound’s adaptive feedback cancellation system. This advanced system ensures that the feedback path is as accurate as possible for each microphone on the hearing instruments and also places limitations on how much it can adapt to changes in the feedback path.  In situations with large changes in the feedback path, such as holding a phone near the hearing instrument, the system incorporates an additional algorithm, Whistle Control. Whistle Control serves as an additional layer of feedback control by reducing the occurrence of feedback that arises from dynamic, transient situations such as using the telephone. Feedback that manages to elude the cancellation system is controlled via gain equalization instead of gain reduction in the frequency range of the feedback. This means that based on the individual’s target gain curves, gain is equalized to match the target curves to combat feedback in lieu of notching or fast-acting gain cuts at the frequencies of the feedback. The signal itself is unaffected while the feedback spike is equalized, thereby simultaneously maintaining audibility while eliminating feedback.  It is important to note that Whistle Control does not reduce gain below the desired response and therefore does not affect audibility. In effect, DFS Ultra restores or equalizes the correct gain and maintains the sound quality, while eliminating feedback.

For more information on ReSound Verso, visit www.gnresound.com or the ReSound Expo Page on Audiology Online.


robin c donham

Robin C. Donham, AuD, FAAA, CCC-A

Product Training Manager for the Government Services Division

Robin Donham, Au.D, F-AAA, CCC/A, is a graduate of Texas Tech University Health Sciences Center. She has worked with Interton as the National Training Manager for the last two years. Currently she is serving as Product Training Manager for the Government Services Division of GN Resound. Previously, Robin was an account manager for the Government Services Division of Interton. She has fit and dispensed hearing aids at the West Texas Rehab Center in Abilene, TX and also been a national presenter for Audiologyonline.com, HealthNet.com, and a presenter and charter member of the Abilene Chapter of the Hearing Loss Association of America (HLAA) formerly Self-Help for the Hard of Hearing (SHHH). She has also been a presenter and public speaker on Audiology related issues with organizations such as the HLAA, the Lion’s Club, Texas Health Fairs, Universities and other educational settings, and Industrial settings, to name a few.  She has research publications and/or poster presentations in balance disorders, electroacoustic testing, hearing aid technology, and team building.  Presenter employed by GN Resound.


Related Courses

ReSound LiNX 3D: The Details and Benefits of Binaural Directionality III
Presented by John Nelson, PhD
Recorded Webinar
ReSound

Presenter

John Nelson, PhD
Course: #29453Level: Intermediate1 Hour
  'Great detail and information regarding Resounds products'   Read Reviews
Binaural Directionality III is the next generation in directionality and is available in the ReSound LiNX 3D family. It improves understanding in background noise while also providing audibility of sounds from all directions.

View this Course for FREE.
Need CEUs? Become a AudiologyOnline member to get unlimited CEUs.

Only $99/yr

Learn More

ReSound Advanced Technology Series: A Year in Review for ReSound
Presented by Brent Kirkwood, PhD
Recorded Webinar
ReSound

Presenter

Brent Kirkwood, PhD
Course: #30223Level: Intermediate1 Hour
  'Good explanation of new, important technology'   Read Reviews
ReSound’s newest products will be described in terms of the benefits offered to the hearing aid user and hearing care professional.

View this Course for FREE.
Need CEUs? Become a AudiologyOnline member to get unlimited CEUs.

Only $99/yr

Learn More

ReSound Government Services: November 2021 What’s on Contract?
Presented by Kara Sinner, MS, CCC-A, FAAA
Live WebinarThu, Nov 4, 2021 at 12:00 pm EDT
Thu, Nov 4, 2021 at 12:00 pm EDT
ReSound

Presenter

Kara Sinner, MS, CCC-A, FAAA
Course: #37135Level: Introductory1 Hour
This presentation will review ReSound products and features available for Government Service Audiologists. Areas of discussion include ReSound hearing instruments, technology features, and ReSound Smart Fit fitting software.

View this Course for FREE.
Need CEUs? Become a AudiologyOnline member to get unlimited CEUs.

Only $99/yr

Learn More

Bridging the Gap: Bimodal Fitting Considerations for Hearing Aid Clinicians
Presented by Neil Wright, AuD
Recorded Webinar
ReSound

Presenter

Neil Wright, AuD
Course: #33557Level: Intermediate1 Hour
  'Presenter was knowledgeable and easy to follow'   Read Reviews
Research has shown the benefits of bimodal stimulation in structured clinical trials, but clinical patients may require programming outside of the standard fitting flow. This presentation will discuss bimodal fitting considerations for hearing aid fitting clinicians to help patients get the most of their bimodal stimulation.

View this Course for FREE.
Need CEUs? Become a AudiologyOnline member to get unlimited CEUs.

Only $99/yr

Learn More

ReSound Assist: Everything You Need to Know for Success
Presented by Brooke Townsend, AuD, CCC-A, FAAA, Ayrton Hogan
Recorded Webinar
ReSound

Presenters

Brooke Townsend, AuD, CCC-A, FAAAAyrton Hogan
Course: #32280Level: Introductory1.5 Hour
  'easy to follow'   Read Reviews
Telehealth is a growing force in the hearing industry. Using ReSound Assist in your clinical practice will allow you to enter this new and upcoming space. Review these four training modules to learn all you need to know to get started with ReSound Assist.

View this Course for FREE.
Need CEUs? Become a AudiologyOnline member to get unlimited CEUs.

Only $99/yr

Learn More