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Valuable information on NoiseGardTM/digital
S1 DIGITAL | 33
When compared with other adaptive technologies that are on the market, the
particular strength of the fully-adaptive FF-NoiseGard is its ability to cancel
broadband noise and not just individual tonal components. Cockpit noise consists
of a mixture of broadband noise components and individual tonal components
(e.g. the fundamentals and harmonics of propeller rotation). If only the tonal
components are canceled, the broadband noise remains unaffected and no signif-
icant noise reduction can be achieved in practice. Because it is fully adaptive, the
NoiseGard
TM
/digital technology is able to simultaneously cancel both broadband
and tonal sound components, resulting in excellent performance at all times.
Overall noise compensation (principle)
The attenuation curves of the passive attenuation and of the digital FB-ANR are
fixed, whereas the attenuation of the digital adaptive FF-ANR depends on the sit-
uation. This reveals the powerful effect of adaptivity, which always provides the
greatest attenuation of the loudest noise components.
0,1
0
-5
-10
-15
-20
-25
-30
-35
kHz
dB
Noise Attenuation
110
Dig. FB
Dig. Adaptive FF
Passive
34


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