DFS Ultra II
This is the feedback control. It is activated when the devices have been calibrated for DFS Ultra. The default
setting is Mild. Adjust the setting to a stronger level (Moderate or Strong) if concerns for feedback arise. The
Music Mode setting is a Mild setting, typically used for music programs or if the patient experiences feedback
only when tonal sounds occur (for example, from a musical instrument).
AutoDFS:
AutoDFS is a feedback control setting that is activated automatically before the hearing
instrument has been calibrated for DFS Ultra II. AutoDFS is designed for use when a patient is unable to
return to the clinic for the fitting, and the hearing instrument is instead shipped to the patient from the
fitter. It applies a mild level of feedback cancellation, but as it has not been calibrated for the patient’s ear,
it may not be as effective at controlling feedback as a Mild setting of DFS Ultra II.
Noise Tracker II
Noise Tracker II noise reduction uses spectral subtraction to reduce noise between words and syllables in
many real-world noisy environments. The Per Environment setting allows for personalized noise reduction
settings in 7 environments. The environments include Quiet, Soft Speech, Loud Speech, Moderate Speech in
Noise, Loud Speech in Noise, Moderate Noise and Loud Noise, and classification is performed on a continuum
if the listening situation has characteristics of more than one listening environment. If a patient is reporting
specific issues such as hearing conversation in restaurants, for example, the fitter can precisely increase the
Noise Tracker II setting only for restaurant-like environments, including Moderate Speech in Noise or Loud
Speech in Noise. This maintains the setting for other environments, permitting a great amount of fitting
precision and personalization. Alternately, the Mild, Moderate and Strong settings of Noise Tracker II apply
the same level of noise reduction for all listening environments, when noise is present.
Wind Guard
Wind Guard applies noise reduction specifically for windy situations. The default setting is Off. If a patient
is experiencing too much wind noise, increase the setting to a stronger level. If the patient experiences the
hearing aid becoming quiet occasionally in outdoor situations, reduce the setting to a milder level.
Expansion
This feature reduces amplification for low-level sounds, such as fans and refrigerator motor noise.
Low Frequency Boost
Low frequency boost is a quick way to increase the low frequency gain from 250 - 1000 Hz.
Sound Shaper
Sound Shaper applies proportional frequency compression to the fitting. Higher frequencies are lowered to a
more usable or audible range for the patient. As patient candidacy criteria for the use of frequency lowering
is based on many factors, the default setting is Off. However, if the fitter perceives the patient could benefit
from frequency lowering, in the case of continued difficulties with speech recognition or previous success
with frequency lowering features, Sound Shaper can be activated.
Environmental Optimizer II
Environmental Optimizer II allows specific gain and Noise Tracker II adjustments for seven different
environments, ensuring the user receives optimal gain and noise reduction settings as the acoustic
environment changes. Classification is performed on a continuum if the listening situation has characteristics
of more than one listening environment. With binaurally fit wireless devices, the hearing instruments will
optimize and synchronize the Environmental Optimizer settings for a binaural fitting. If a patient experiences
difficulty in a particular listening environment, adjust the sliders to assign environment specific gains and
noise reduction without requiring a manual program change or altering overall program settings.
