Study: NCT05476328

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: OPAL Sound Processing Strategy.
Description: OPAL Sound Processing Strategy. OPAL sound processing strategy designed to improve perception of fundamental frequency (F0) as cue to lexical tone in tonal languages and to pitch in music. This research strategy will be implemented in the Nucleus 6 CP900 sound processors. The programming will be performed by the investigational software Cochlear Device Interface Tool (CDI Tool). Investigational firmware will be written on a commercially available N6 sound processor sound processor.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: OPAL-EM
Description: OPAL-EM (Enhanced Modulation) is a version of OPAL that improves temporal accuracy in the coding of F0 amplitude-modulation in the stimulus envelope. It is specifically designed to address the need for use of low stimulation rates (i.e., lower than the recommended OPAL rate of around 1200 pps/ch) but it is also expected to provided improvements for all stimulation rates by virtue of the improved temporal accuracy it provides.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: SPACE
Description: SPACE (Spread Precompensation Advanced Combination Encoder) is a sound coding strategy that is intended to improve spectral resolution, and hence hypothesised to improve cochlear implant (CI) speech understanding in noise. It is an alternative to the ACE sound coding strategy. It has been implemented on the Nucleus 7 CP1000 sound processor for CIC4-based implants.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: FAST
Description: FAST (Fundamental Asynchronous Stimulus Timing) is a low- and variable-rate coding strategy that has been shown to be power efficient and significantly increase sensitivity to ITD cues in bilateral subjects. It also explicitly codes low F0s as the rate of stimulation and may have tone and music benefits. It has been implemented on the Nucleus 5 CP800 sound processor for CIC4-based implants.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: OPAL-SPACE
Description: OPAL-SPACE (combined OPAL and SPACE strategy) aims to preserve as many of the significant features encoded by both OPAL and SPACE strategies individually. Since SPACE codes spectral envelope information, while OPAL codes temporal periodicity information, it is reasonable to suggest that both coding techniques can be combined to improve perception additively.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: FAST-OPAL
Description: FAST-OPAL (combined FAST and OPAL strategy) strategy was developed to improve FAST strategy performance in noisy environments. The processing techniques employed by FAST-OPAL retain the sparse, yet temporally precise coding of temporal envelope information, while improving coding of that information in noise and coding of relative across-channel intensity in noise.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: Cochlear Device Interface Tool
Description: For all strategies, programming will be performed using a research version of Custom Sound and the investigational software: Cochlear Device Interface Tool (CDI Tool). Investigational software will be used to stream stimulation sequences to a commercially available N6 sound processor using the Cochlear NIC4.1 interface.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: Cochlear Device Interface Tool
Description: For all strategies, programming will be performed using a research version of Custom Sound and the investigational software: Cochlear Device Interface Tool (CDI Tool). Investigational software will be used to stream stimulation sequences to a commercially available N6 sound processor using the Cochlear NIC4.1 interface.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: Cochlear Device Interface Tool
Description: For all strategies, programming will be performed using a research version of Custom Sound and the investigational software: Cochlear Device Interface Tool (CDI Tool). Investigational software will be used to stream stimulation sequences to a commercially available N6 sound processor using the Cochlear NIC4.1 interface.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: Cochlear Device Interface Tool
Description: For all strategies, programming will be performed using a research version of Custom Sound and the investigational software: Cochlear Device Interface Tool (CDI Tool). Investigational software will be used to stream stimulation sequences to a commercially available N6 sound processor using the Cochlear NIC4.1 interface.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: Cochlear Device Interface Tool
Description: For all strategies, programming will be performed using a research version of Custom Sound and the investigational software: Cochlear Device Interface Tool (CDI Tool). Investigational software will be used to stream stimulation sequences to a commercially available N6 sound processor using the Cochlear NIC4.1 interface.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: Cochlear Device Interface Tool
Description: For all strategies, programming will be performed using a research version of Custom Sound and the investigational software: Cochlear Device Interface Tool (CDI Tool). Investigational software will be used to stream stimulation sequences to a commercially available N6 sound processor using the Cochlear NIC4.1 interface.