Verification of a Proposed Clinical Electroacoustic Test Protocol for Personal Digital Modulation Receivers Coupled to Cochlear Implant Sound Processors

Nair, Erika L.; Sousa, Rhonda; Wannagot, Shannon

doi:10.3766/jaaa.16070

J Am Acad Audiol

2017

DOI: 10.3766/jaaa.16070

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Verification of a Proposed Clinical Electroacoustic Test Protocol for Personal Digital Modulation Receivers Coupled to Cochlear Implant Sound Processors

Erika L. Nair¹,

Rhonda Sousa²,

Shannon Wannagot

Abstract: Both protocols were shown to be effective in taking reliable electroacoustic measurements and demonstrate transparency. Both protocols are felt to be clinically feasible and to address the needs of populations that are unable to reliably report regarding the integrity of their personal DM systems.

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Cited by 2 publications

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“…As our center regularly evaluates CI speech processors for transparency with the use of FM and/or DM systems based on a protocol developed from careful examination and adaptation of the AAA (2008) transparency guidelines and the Schafer et al (2013) proposed protocol (Nair et al, 2017), our team was uniquely poised to develop a protocol and verify transparency for CI speech processors when coupled to the Cochlear MM21.…”

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Verification Protocol for Signal Transparency Using the Cochlear Mini-Microphone 21 and Digital Modulation Transmitter and Receiver with Cochlear Implants

Sousa¹,

Nair²,

Wannagot

2018

j am acad audiol

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Background: Guidelines established by the American Academy of Audiology (AAA) currently recommend behavioral testing when fitting frequency-modulated (FM) systems to individuals with cochlear implants (CIs). A protocol for completing electroacoustic measures on CI sound processors has not yet been established or validated when fitting either FM or digital-modulated (DM) systems, mini microphones, or mini microphones coupled to DM systems. In response, professionals have used or altered the AAA (2008) electroacoustic verification steps for fitting FM systems to hearing aids when fitting FM/DM systems, mini microphones, or mini microphones coupled to FM/DM systems to CI sound processors. Purpose: The purpose of this research is to determine if the electroacoustic verification guidelines established by AAA (2008) for fitting FM systems to hearing aids are feasible and verifiable when fitting mini microphones and mini microphones coupled to DM systems to CI sound processors. Research Design: Electroacoustic measures were conducted on 51 Cochlear Nucleus 6/CP910 sound processors, one Cochlear Wireless Mini Microphone 2+ (MM2+), and one Phonak DM System (one Roger Inspiro transmitter and one Roger X receiver) using an adapted AAA (2008) protocol (Nair et al, 2017). Phonak?s recommended default receiver gain setting was used with the Roger X receiver and adjusted if necessary to achieve transparency. Transparency refers to when the signal output of the device is the same when coupled and when not coupled to remote microphone technology. Study Sample: Electroacoustic measures were conducted on 51 Cochlear Nucleus 6/CP910 sound processors. In this study, the 51 Cochlear Nucleus 6/CP910 sound processors were either streaming to the Cochlear MM2+ or streaming to the MM2+ coupled to a Phonak DM system. Data Collection and Analysis: In a clinical setting, using the AAA (2008) protocol for electroacoustic measurements when fitting FM systems to hearing aids, electroacoustic measurements using various equipment (MM2+ and Phonak DM system) were performed on 51 Cochlear Nucleus 6/CP910 sound processors using the Audioscan Verifit to determine transparency and verify DM advantage, comparing speech inputs (65 dB SPL) in an effort to achieve equal outputs. If transparency was not achieved when the CI sound processor was streaming to the MM2+ coupled to the Phonak DM system at the default receiver gain, adjustments were made to the Roger X receiver?s gain. The integrity of the signal was monitored with the manufacturer?s monitor earphones. Results: Using the AAA (2008) hearing aid protocol, when the Cochlear Nucleus 6/CP910 sound processor was streaming to the Cochlear MM2+, transparency was achieved for 50 of 51 CI sound processors. Again, using the AAA (2008) protocol when the Cochlear Nucleus 6/CP910 sound processor was streaming to the Cochlear MM2+ coupled to the Phonak DM system at Phonak?s recommended default receiver gain, 28 sound processors achieved transparency. After the receiver gain was adjusted, the...

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mentioning

confidence: 99%

Verification Protocol for Signal Transparency Using the Cochlear Mini-Microphone 21 and Digital Modulation Transmitter and Receiver with Cochlear Implants

Sousa¹,

Nair²,

Wannagot

2018

j am acad audiol

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Verification of EasyGain Settings in the Roger Remote Microphone System

Thibodeau

2023

Am J Audiol

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Purpose: The purpose of this study was to evaluate how the EasyGain settings on a wireless receiver used with a remote microphone (RM) affected output as a function of hearing loss and receiver type. Method: To assess the effects of the EasyGain setting on a Roger receiver, a Phonak Naida V90 superpower hearing aid (HA), two universal Roger X (02) receivers, two Roger 18 integrated receivers, and a Roger Inspiro transmitter were used. An electroacoustic evaluation was performed for five degrees of hearing loss ranging from a flat 40 to 80 dB HL, and for nine EasyGain settings from +8 to −8 dB with each Roger receiver. Results: A three-way analysis of variance indicated significant main effects of hearing loss, receiver type and EasyGain settings, as well as their two-way interactions ( p < .05). Overall, the output of the integrated receiver was 2.77 dB higher than that of the universal receiver. The change in output with 2-dB changes in EasyGain setting varied with the degree of hearing loss. For mild hearing loss (40 and 50 dB), every 2-dB change in EasyGain produced an average of 1.93 dB ( SD = 0.17) change in the root-mean-square (RMS) output. For the higher degrees of hearing loss (60, 70, and 80 dB HL), the change in RMS varied depending on the range of EasyGain setting as follows: when EasyGain was > 0 dB, every 2-dB change in EasyGain setting produced an average change in RMS output of 1.32 dB ( SD = 0.41); however, when EasyGain was ≤ 0 dB, every 2-dB change resulted in a mean 1.95 dB ( SD = 0.16) change. Conclusions: The benefits of EasyGain technology on the RMS output are dependent on the interaction of the receiver type, degree of hearing loss, and EasyGain settings. The results highlight the importance of electroacoustic verification to determine appropriate settings for optimal audibility when using an RM system.

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Verification of a Proposed Clinical Electroacoustic Test Protocol for Personal Digital Modulation Receivers Coupled to Cochlear Implant Sound Processors

Cited by 2 publications

References 4 publications

Verification Protocol for Signal Transparency Using the Cochlear Mini-Microphone 21 and Digital Modulation Transmitter and Receiver with Cochlear Implants

Verification Protocol for Signal Transparency Using the Cochlear Mini-Microphone 21 and Digital Modulation Transmitter and Receiver with Cochlear Implants

Verification of EasyGain Settings in the Roger Remote Microphone System

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