Cochlear SPrint Sound Processor Información técnica descargar pdf (Pagina 15)

CLINICAL GUIDANCE | SECTION ONE

• Automatic Gain Control (AGC) – front-end ampliﬁer that reduces the

gain of high amplitude inputs to avoid distortion/peak clipping. The AGC

threshold depends upon the microphone sensitivity setting.

• Autosensitivity – this algorithm automatically adjusts the microphone

sensitivity to lessen the effects of background noise.

1.3.1 Input Processing/SmartSound™ Options

• ADRO

– Adaptive Dynamic Range Optimization - a digital pre-processing

signal algorithm designed to improve audibility of low-level sounds and

reduce the gain on higher level sounds to keep the signal level at the

desired point below C-level. This is available for the SPrint

™

, Freedom

™

, and

CP810 Sound Processors.

• Whisper

™

– a fast-acting compression circuit that makes soft sounds easier

to hear. This is available for the ESPrit™ 3G, Freedom, and CP810 Sound

Processors.

• Beam

™

– a beamforming algorithm that uses spatial input processing and

intelligent noise cancelling to automatically adjust microphone directionality

depending on the presence and type of noise sources.

It improves the signal-to-noise ratio (SNR) by reducing the loudness of

sound that originates from behind and to the sides of the listener and makes

it easier to hear sounds originating from the front. It is adaptive, so if the

noise source is moving dynamically, so too does the direction of maximum

attenuation. This is available for the Freedom and CP810 Sound Processors.

• Zoom – uses an algorithm that has a ﬁxed directional pattern, where the

pattern does not change as a function of changes in spatial separation

between speech and noise, keeping the soundscape relatively constant.

It gives optimal blocking of diffuse noise, or when noise comes from

many directions simultaneously and the signal of interest is in front of the

listener. This is available for the CP810 Sound Processor.

• Autosensitivity

™

– automatically adjusts microphone sensitivity based on

the noise ﬂoor of the surrounding environment.

The Custom Sound clinical programming software provides combinations

of these input processing options.

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