參數(shù)資料
型號(hào)： GA3222
廠(chǎng)商： Gennum Corporation
英文描述： Advanta-TM ADRO-TM - Enabled DSP System
中文描述： 埃德瓦塔-商標(biāo)化作-商標(biāo)- DSP系統(tǒng)啟用
文件頁(yè)數(shù)： 9/21頁(yè)
文件大小： 291K
代理商： GA3222
GA3222 Preliminary Data Sheet
34477 - 0
February 2006
9 of 21
6. Advanta Overview
Advanta is a DSP system with adaptive algorithms and the ADRO sound
processing methodology implemented on the Voyageur hardware platform. This
hardware platform is a combination of a DSP core and a high fidelity audio
CODEC. As well, thinSTAX packaging provides easy integration into a wide range
of applications from CIC to BTE.
The CODEC converts analog audio into digital samples for the DSP, and outputs
processed samples to the receiver. The CODEC also implements cross fading
between audio paths. The DSP core implements the adaptive algorithms, ADRO
processing, volume control, and tone generation. The adaptive algorithms include
an adaptive directional microphone and feedback cancellation. Internal noise
reduction is also included. The processing is based on ADRO targets, which
eliminates the need for EQ filters or wide band gain settings.
7. Functional Block Description
7.1 ADRO Processing
ADRO uses advanced statistical analysis and fuzzy logic control in 32 narrow
frequency channels to achieve a natural sound, with maximum listening comfort
and audibility in all environments. Instead of compressing the signal, the most
informative part of the dynamic range is selected and presented linearly in every
one of the 32 channels. The linear processing of ADRO results in a natural sound
that is preferred by first-time and experienced hearing aid users alike.
ADRO is easy to fit and flexible enough to fit any hearing loss taking individual
preferences into account. There is no need to consider compression ratios,
knee-points, or other complex settings – intuitive adjustments fine tune ADRO to
overcome any hearing problem. Once fitted well in one environment, ADRO
automatically adjusts to any other. Clinical trials show substantial benefits in
background noise, with loud, average and soft speech in quiet and for a wide
variety of environmental sounds.*Blamey PJ, Martin LFA & Fiket HJ (2004). A
digital processing strategy to optimize hearing aid outputs directly. J Am Acad
Audiol. (2004 Nov–Dec; 15(10):716–28)
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