The effect of pulse rate on temporal resolution and speech intelligibility in cochlear implant users

The effect of pulse rate on temporal resolution and speech intelligibility in cochlear implant users - Pulse rate vs. speech intelligibility in CI users

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

NL-OMON

Registry ID

NL-OMON41110

Enrollment

Registered

2014-09-12

Start date

2015-01-28

Completion date

Unknown

Last updated

2024-04-23

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Post-lingual severe hearing loss severe hearing loss with onset after age of 4 years

Interventions

The patients that comply to the in- and exclusion criteria have specific types of speech processors, each of which is able to carry a maximum of 4 programs (MAPs, which drive the implant electrodes)

Eligibility

Age

18 Years to 99 Years

Inclusion criteria

Inclusion criteria: - Mother tongue Dutch - Oral communication as primary mode of communication - Age at inclusion: capacitated adult (>= 18 years of age) - Onset of severe hearing impairment after the age of 4 (post-lingual) - Minimally 1 year experience with the CI, i.e. at the time of inclusion the first fit should be >= 1 years ago (first CI in case of bilateral user) - CI (either unilateral or bilateral) should be from the brand Cochlear

Exclusion criteria

Exclusion criteria: - Non- or impaired Dutch speaker - Sign language or lip reading as primary mode of communication - Incapacitated persons

Design outcomes

Primary

Measure	Time frame
For the listening task in objective 1, the main study parameter is the amplitude modulation detection threshold (AMDT) of postlingual CI users as a function of pulse rate at two modulation frequencies. The AMDT, a measure of temporal resolution, is the minimal modulation depth needed for the subject to distinguish amplitude modulated from amplitude unmodulated noise samples. For objective 2, the main study parameter is speech intelligibility (phoneme score for words in quiet and SRT for sentences in noise) as a function of pulse rate. For objective 3, the main study parameters are the intraclass correlation coefficient and the 95% confidence interval.	—

Measure

Time frame

For the listening task in objective 1, the main study parameter is the amplitude modulation detection threshold (AMDT) of postlingual CI users as a function of pulse rate at two modulation frequencies. The AMDT, a measure of temporal resolution, is the minimal modulation depth needed for the subject to distinguish amplitude modulated from amplitude unmodulated noise samples. For objective 2, the main study parameter is speech intelligibility (phoneme score for words in quiet and SRT for sentences in noise) as a function of pulse rate. For objective 3, the main study parameters are the intraclass correlation coefficient and the 95% confidence interval.

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Secondary

Measure	Time frame
As secondary outcomes, correlation coefficients will be calculated between the obtained AMDTs at different modulation frequencies and between AMDTs at different modulation frequencies and speech intelligibility scores for each pulse rate.	—

Countries

Netherlands

Outcome results

None listed

Source: NL-OMON (via WHO ICTRP)