Assessment of Directionality Performances: Comparison between Freedom and CP810 Sound Processors

Razza, Sergio; Albanese, Greta; Ermoli, Lucilla; Zaccone, Monica; Cristofari, Eliana

doi:10.1177/0194599813496382

Cited by 4 publications

(4 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the ABF scheme, all patients, regardless of etiology or CI experience, showed improved SRTs as compared to the omnidirectional microphone settings. Razza et al evaluated the impact of FBF and ABF settings of the Nucleus 5 CP810 sound processor in a S 0° N 45° scenario and, in contrast to our results, did not find a significant difference [ 24 ]. Apart from the fact that the directional sensitivities of the CP810 beamformers are slightly different compared to the SONNET, this is most likely due to the different spatial setups of speech and noise sources.…”

Section: Discussioncontrasting

confidence: 99%

Fixed and adaptive beamforming improves speech perception in noise in cochlear implant recipients equipped with the MED-EL SONNET audio processor

et al. 2018

View full text Add to dashboard Cite

ObjectiveTo determine the impact of the fixed and adaptive beamforming technology of the new MED-EL SONNET cochlear implant audio processor on speech perception in noise.MethodsThe study cohort comprises 18 postlingually deafened adult cochlear implant recipients with at least six months of experience. Speech reception thresholds were measured with the Oldenburg Sentence Test in continuous, speech-shaped noise. Target sentences were presented in front of the listener, with noise sources placed at -135° and 135°, respectively. Outcome measures were the differences in speech reception threshold using omnidirectional, fixed and adaptive beamformer microphone settings.ResultsThe use of directional microphones significantly improved speech reception thresholds: fixed beamformer vs. omnidirectional: 4.3 dB (95%-CI [3.1; 5.5]), p<0.0001; adaptive beamformer vs. omnidirectional: 6.1 dB (95%-CI [4.9; 7.3]), p<0.0001; and adaptive beamformer vs. fixed beamformer: 1.8 dB (95%-CI [0.7; 3.0]), p = 0.001.ConclusionThis study confirms the previously reported improvements in speech perception in noise of the fixed beamformer microphone setting and is the first to report significant improvements in speech perception in noise when applying the adaptive beamformer microphone settings of the SONNET audio processor. Cochlear implant users may be able to benefit from improved hearing performance especially in difficult listening situations.

show abstract

Section: Discussioncontrasting

confidence: 99%

Fixed and adaptive beamforming improves speech perception in noise in cochlear implant recipients equipped with the MED-EL SONNET audio processor

et al. 2018

View full text Add to dashboard Cite

show abstract

“…This is comparable to our observations in the condition S 0 N 90 : the effect on the SRT in noise after sound processor upgrade was small in the Everyday program (−0.3 dB SNR) while it was large when comparing the Everyday program with the Noise program (4.7 dB SNR). Razza et al (17) compared the Freedom with the CP810 in cochlear implant patients, showing a significant effect of the sound processor on the SRT in noise. The CP810 allowed better performance than the Freedom device in either of two preprocessing configurations.…”

Section: Discussionmentioning

confidence: 99%

Clinical Validation of a Sound Processor Upgrade in Direct Acoustic Cochlear Implant Subjects

Kludt

D’hondt²,

Lenarz³

et al. 2017

Otology &Amp; Neurotology

View full text Add to dashboard Cite

Objective:The objectives of the investigation were to evaluate the effect of a sound processor upgrade on the speech reception threshold in noise and to collect long-term safety and efficacy data after 2½ to 5 years of device use of direct acoustic cochlear implant (DACI) recipients.Study Design:The study was designed as a mono-centric, prospective clinical trial.Setting:Tertiary referral center.Patients:Fifteen patients implanted with a direct acoustic cochlear implant.Intervention:Upgrade with a newer generation of sound processor.Main Outcome Measures:Speech recognition test in quiet and in noise, pure tone thresholds, subject-reported outcome measures.Results:The speech recognition in quiet and in noise is superior after the sound processor upgrade and stable after long-term use of the direct acoustic cochlear implant. The bone conduction thresholds did not decrease significantly after long-term high level stimulation.Conclusions:The new sound processor for the DACI system provides significant benefits for DACI users for speech recognition in both quiet and noise. Especially the noise program with the use of directional microphones (Zoom) allows DACI patients to have much less difficulty when having conversations in noisy environments. Furthermore, the study confirms that the benefits of the sound processor upgrade are available to the DACI recipients even after several years of experience with a legacy sound processor. Finally, our study demonstrates that the DACI system is a safe and effective long-term therapy.

show abstract

“…In some upgrade studies 6 , 8 , 15 of Freedom and CP810 processors significant performance differences were found for the Beam algorithm which were attributed to differences in microphone characteristics, matching accuracy and possible deviations from factory settings over time. The use of two omnidirectional microphones and firmware calibration in the CP810 should help to reduce hardware dependent variations and ensure similar conditions for every test subject.…”

Section: Discussionmentioning

confidence: 99%

“…It should be pointed out, however, that these results are somewhat dependent on the room acoustic characteristics and the test setup. A more reverberant room such as the one which was used in the HearCom study 12 or smaller distances from the subject’s head to the loudspeakers 8 , 14 might change the outcomes. Also, the Zoom and Beam conditions which were tested in the current study are usually combined with other preprocessing options in the clinical practice for everyday environment situations.…”

Section: Discussionmentioning

confidence: 99%

Speech Intelligibility in Various Noise Conditions with the Nucleus® 5 Cp810 Sound Processor

Dillier

Lai

2015

Audiology Research

View full text Add to dashboard Cite

The Nucleus® 5 System Sound Processor (CP810, Cochlear™, Macquarie University, NSW, Australia) contains two omnidirectional microphones. They can be configured as a fixed directional microphone combination (called Zoom) or as an adaptive beamformer (called Beam), which adjusts the directivity continuously to maximally reduce the interfering noise. Initial evaluation studies with the CP810 had compared performance and usability of the new processor in comparison with the Freedom™ Sound Processor (Cochlear™) for speech in quiet and noise for a subset of the processing options. This study compares the two processing options suggested to be used in noisy environments, Zoom and Beam, for various sound field conditions using a standardized speech in noise matrix test (Oldenburg sentences test). Nine German-speaking subjects who previously had been using the Freedom speech processor and subsequently were upgraded to the CP810 device participated in this series of additional evaluation tests. The speech reception threshold (SRT for 50% speech intelligibility in noise) was determined using sentences presented via loudspeaker at 65 dB SPL in front of the listener and noise presented either via the same loudspeaker (S0N0) or at 90 degrees at either the ear with the sound processor (S0NCI+) or the opposite unaided ear (S0NCI-). The fourth noise condition consisted of three uncorrelated noise sources placed at 90, 180 and 270 degrees. The noise level was adjusted through an adaptive procedure to yield a signal to noise ratio where 50% of the words in the sentences were correctly understood.In spatially separated speech and noise conditions both Zoom and Beam could improve the SRT significantly. For single noise sources, either ipsilateral or contralateral to the cochlear implant sound processor, average improvements with Beam of 12.9 and 7.9 dB in SRT were found. The average SRT of –8 dB for Beam in the diffuse noise condition (uncorrelated noise from both sides and back) is truly remarkable and comparable to the performance of normal hearing listeners in the same test environment. The static directivity (Zoom) option in the diffuse noise condition still provides a significant benefit of 5.9 dB in comparison with the standard omnidirectional microphone setting. These results indicate that CI recipients may improve their speech recognition in noisy environments significantly using these directional microphone-processing options.

show abstract

Assessment of Directionality Performances: Comparison between Freedom and CP810 Sound Processors

Abstract: The results suggest that hardware developments achieved in the design of CP810 allow an immediate and relevant directional advantage as compared to the previous-generation Freedom device.

Cited by 4 publications

References 21 publications

Fixed and adaptive beamforming improves speech perception in noise in cochlear implant recipients equipped with the MED-EL SONNET audio processor

Fixed and adaptive beamforming improves speech perception in noise in cochlear implant recipients equipped with the MED-EL SONNET audio processor

Clinical Validation of a Sound Processor Upgrade in Direct Acoustic Cochlear Implant Subjects

Speech Intelligibility in Various Noise Conditions with the Nucleus® 5 Cp810 Sound Processor

Contact Info

Product

Resources

About