Medel SYMFIT 6.1, Руководство пользователя

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SYLLABIC (or fast compression)
Syllabic compression adjusts the gain for instantaneous
fluctuations that occur within speech. It operates with
a fast level meter using an attack time of 10 ms and a
release time of 100 ms.
It should be used in frequency bands where a user has
a strongly reduced dynamic range (moderate to severe
hearing loss) which is more common in the high
frequencies. In this case it is preferable to select syllabic
compression for the compression areas five to eight.
The attack and release time of syllabic compression are
fixed.
Speech/Sound
With the tools in this tab, the Speech and Noise
Management, Sound Smoothing, Wind-Noise reduction,
and Feedback Cancellation can be set. These settings
can support the user’s hearing experience in different
environmental situations (figure 29).
Speech and Noise Management
This feature is an adaptive algorithm following the
currently detected noise that maximizes both the
hearing comfort and the speech intelligibility for each
acoustical situation. This means that speech signals
are emphasized while interfering noises such as traffic
noise or air conditioning are suppressed. If the
checkbox is enabled you can select between med
(noise attenuation of 8 – 15 dB) and max (noise
attenuation of 12 – 24 dB) noise attenuation.
Sound Smoothing
This feature guarantees high listening comfort. The
algorithm detects loud sounds with a sudden onset
(like clattering dishes, rustling paper, or slamming
doors) which are annoying for hearing impaired people.
Sound Smoothing eliminates only these sounds
without affecting speech or soft impulsive sounds and
therefore maintains the naturalness of sound. A choice
can be made between med (medium Sound Smoothing)
and max (maximum Sound Smoothing). The two
settings differ with respect to the amount of
attenuation of loud impulsive sounds.
Wind-Noise reduction
This feature is useful in special listening situations
where wind generates unwanted noises in the Amadé.
The reason for this fact is that the openings for the
microphone ports can generate interference.
figure 29