ReSound Combats Feedback Squeal with Unique DFS Ultra Technology
ReSound takes a significant leap forward in feedback cancellation with the development of DFS Ultra technology - feedback-free amplification with uncompromised sound quality.
Minneapolis, MN. April 28, 2011.
ReSound, the technology leader in hearing solutions, is breaking new ground with a unique approach to feedback cancellation
- Digital Feedback Suppression (DFS) Ultra.
“With DFS Ultra, there is no compromise. The user can enjoy the most advanced, effective feedback control on the market with the same superior sound quality that ReSound always provides.”
As the first manufacturer to introduce feedback cancellation
systems for hearing instruments in the early 1990s, ReSound continues to set the standard for feedback management with a technology that is smart enough to distinguish between feedback noise and other naturally occurring sounds.
"With DFS Ultra technology, users get maximum performance from a smarter hearing aid," said Tammara Stender, Senior Audiologist, GN ReSound. "There is no need to turn down the gain; the technology's ability to distinguish feedback from other high pitched sounds ensures that only feedback is eliminated."
DFS Ultra uses advanced modeling techniques of the input and feedback signals to increase the stable gain that is available in a fitting, while combating feedback in even the most difficult situations. Using a phase-inverted signal relative to the feedback pathway into the signal pathway of the hearing instrument, the system generates sound waves that cancel out the squeal.
DFS Ultra also uses two feedback filters: a static filter that is customized to the specific hearing aid and the person wearing it, and a second dynamic filter that responds to changes in everyday use. This means that important everyday sounds like phone rings, alarm beeps and music can be amplified to desired levels without being mistaken for feedback, plus actions such as giving someone a hug are feedback-free.
"Today, every hearing aid manufacturer has a feedback suppression system, but they often come with trade-offs," said Stender. "With DFS Ultra, there is no compromise. The user can enjoy the most advanced, effective feedback control on the market with the same superior sound quality that ReSound always provides."
To learn more about DFS Ultra feedback cancellation
from ReSound, visit http://www.gnresound.com/professionals/technologyandinnovation/DFSUltra.aspx
ReSound is the industry technology leader in hearing solutions. Since the company’s inception in 1943, ReSound has been responsible for a number of hearing industry firsts, including Wide Dynamic Range Compression (WDRC), Digital Feedback Suppression (DFS) and the first open-standard digital chip. Headquartered in Ballerup, Denmark, GN ReSound is part of The GN ReSound Group.