GA3284 Datasheet, PDF (6/15 Pages) ON Semiconductor – Pre-configured DSP System

INSPIRIA GA3284
Front
Mic
+
T−coil
MS
switch
(N.O.)
Rear
Mic
+
+
−
Zero Biased
Receiver
CS44
VC
Figure 4. Typical Hearing Instrument Assembly Diagram
INSPIRIA GA3284 OVERVIEW
The Inspiria GA3284 is a DSP system with adaptive
algorithms that run on an advanced hardware platform. This
hardware platform is a combination of a DSP core and a high
fidelity audio CODEC. As well, the thinSTAX packaging
provides easy integration into a wide range of applications
from CIC to BTE.
The audio functions implemented on the CODEC include
tone generation, peak clipping and cross fading between
audio paths. The DSP core implements FrontWave
directional processing, programmable filters, adaptive
algorithms, compression, wideband gain, and volume
control. The adaptive algorithms include Adaptive Noise
Reduction, Adaptive Feedback Cancellation and Adaptive
Directional Microphones.
The Adaptive Noise Reduction reduces audible noise in a
low distortion manner while preserving perceived speech
levels. The Adaptive Feedback Canceller reduces acoustic
feedback while offering robust performance against pure
tones. The Adaptive Directional Microphone (ADM)
algorithm automatically reduces the level of sound sources
that originate from behind or from the side of the
hearing−aid wearer without affecting sounds from the front.
The algorithm accomplishes this by adjusting the null in the
microphone polar pattern to minimize the noise level at the
output of the ADM.
The Inspiria GA3284 utilizes the power and capabilities
of the advanced hardware platform to deliver advanced
features and enhanced performance previously unavailable
to a product in its class. As well, the Inspiria GA3284
contains security features to protect clients’ Intellectual
Property against device cloning and software piracy.
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