Optimized Digital Signal Processing

One microphone - differentiated processing 

The acoustic and electric sound processing components of the DUET™ receive signals from a single microphone. The parallel processing of these signals, however, is performed separately and optimized for both acoustic hearing (focus on low frequency hearing) and cochlear implant stimulation (focus on high frequency hearing) respectively. This allows the user to have a clearer and more precise sound localization.

Input Dynamic Range (IDR)

The DUET automatically adjusts the sound window to capture all the vital cues for understanding speech. The systems Input Dynamic Range is 75 dB, with a sound window of 55 dB. The DUET makes the necessary modifications to the window without requiring special programming or the use of a switch.

The system is designed to divide the incoming signal into two separate optimized paths, assuring the best signal processing for the markedly different needs of acoustic and cochlear implant stimulation.

Automatic Dual Loop AGC
DUET users gain best sound quality by the system’s use of two independent dual-loop Automatic Gain Control (AGC) functions. There is one AGC dedicated for the cochlear implant component and another for the acoustic component. By automatically shifting between fast-acting and slow-acting compression modes, the system assures the best possible hearing quality for both the acoustic and electrical stimulation functions separately.

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