Effect of an ambient noise reduction algorithm on different noise signals in cochlear implant (CI) users

Status

Active, not recruiting

Phases

Unknown

Study type

Observational

Source

DRKS

Registry ID

DRKS00025248

Enrollment

Registered

2021-12-29

Start date

2022-02-24

Completion date

Unknown

Last updated

2026-06-22

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

Conditions

H83.3

Interventions

Group 1: The group of patients are fitted with a cochlear implant. Hearing tests are conducted which aim to evaluate the actual speech perception in situations with background noise and to evaluate th

Eligibility

Sex/Gender

All

Age

18 Years to 85 Years

Inclusion criteria

Inclusion criteria: Fitted with a cochlear implant for at least 3 months Speech perception score in quiet in a sentence test at least 70%

Exclusion criteria

Exclusion criteria: Cognitive impairments Lack of German language skills

Design outcomes

Primary

Measure	Time frame
Measurements: (a) Speech perception test (Oldenburg sentence test): Training: - 2 test lists á 20 sentences in quiet - 2 test runs á 20 sentences with 2 different interfering sounds Test: - 5 interfering noises x 2 test lists x 2 runs = 20 measurements + training= 24 measurements. Duration: ~ 1 ½ hours b) ACALES: Training: - 1 run with a randomly chosen noise (plausibility test). Test: - 5 interfering noises x 2 runs Duration: ~ 45 hour minutes c) Questionnaire on listening effort: Handed out once before the beginning of the measurements Duration: 15 minutes Total measurement duration: ~ 2 1/2 hours Measurements with subjects are about to start in June. A total period of one year is planned for the measurements of the 20 subjects.	—

Measure

Time frame

Measurements: (a) Speech perception test (Oldenburg sentence test): Training: - 2 test lists á 20 sentences in quiet - 2 test runs á 20 sentences with 2 different interfering sounds Test: - 5 interfering noises x 2 test lists x 2 runs = 20 measurements + training= 24 measurements. Duration: ~ 1 ½ hours b) ACALES: Training: - 1 run with a randomly chosen noise (plausibility test). Test: - 5 interfering noises x 2 runs Duration: ~ 45 hour minutes c) Questionnaire on listening effort: Handed out once before the beginning of the measurements Duration: 15 minutes Total measurement duration: ~ 2 1/2 hours Measurements with subjects are about to start in June. A total period of one year is planned for the measurements of the 20 subjects.

—

Countries

Germany

Contacts

Public ContactVerena Müller

Uniklinik KölnHNO

verena.mueller@uk-koeln.de022147887755

Outcome results

None listed

Source: DRKS (via WHO ICTRP) · Data processed: Jun 27, 2026