Trial document




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  DRKS00018348

Trial Description

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Title

Impact of spectral and temporal modulation on music perception by cochlear implant recipients

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Trial Acronym

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URL of the Trial

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Brief Summary in Lay Language

The main purpose of implanting a cochlear implant is to restore hearing so that patients are able to understand spoken language. Because listening to music increases the quality of life in general, music perception becomes more important in CI-research.
To improve the music perception of CI-users it is necessary to get a better understanding of how CI-users experience music. While the rhythm perception of CI-users is quite good, their pitch and melody perception is limited. Instrument recognition of CI-patients is unreliable. They can differentiate between percussive and non-percussive instruments, but within these groups the accuracy is low. Overall CI-users rate music as less pleasant than normal-hearing listeners.
This study investigates the impact of spectral and temporal modulation on the appraisal of music by CI-users. The test persons listen to filtered and non-filtered recordings of instruments and synthetic sounds and rate them by the following criteria: pleasantness, naturalness and musicality. Afterwards the test persons listen to the temporal unmodulated synthetic stimuli and to the ones which are set with a vibrato. If they perceive a difference, they will be asked to rate these stimuli again by the same criteria pointed out above.
Normal-hearing persons serve as control group.

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Brief Summary in Scientific Language

Stringed instruments seem to be rated less pleasant than other instruments by CI-users. Therefore it shall be tested if a spectral filter of odd or even harmonics of different instruments have an impact on the timbre appraisal of CI-users. A well known melody (“Happy birthday to you”) was recorded by a violin, a clarinet and a flute. Two different filters were applied on the recorded sounds, which either eliminate the odd or the even overtones. In the end there are three versions of every instrument: the unprocessed (all overtones), only odd overtones and only even overtones. Additionally the melody is recorded by a synthesizer with sawtooth-wave, rectangular-wave and sine wave. The test persons will be asked to rate these stimuli by the following criteria: pleasantness, naturalness and musicality.
Temporal modulation such as vibrato have a positive impact on the appraisal of music in general. To test if this effect applies also to CI-users, the synthetic sounds are modulated by a vibrato. In an AB-test it will be checked, if the CI-users hear any difference between the stimuli. If so, they will be asked to rate the modulated stimuli again, by the same criteria pointed out above.
Normal-hearing persons serve as control group.

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Organizational Data

  •   DRKS00018348
  •   2019/09/26
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  •   yes
  •   Approved
  •   5733R, Registrierungs-ID: 2016105716, Ethik-Kommission an der Medizinischen Fakultät der Heinrich-Heine-Universität Düsseldorf
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Secondary IDs

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Health Condition or Problem studied

  •   H90 -  Conductive and sensorineural hearing loss
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Interventions/Observational Groups

  •   CI-users listen to a well-known melody, which was recorded by a flute, a clarinet, a violin and a synthesizer. The stimuli are both unmodified and spectral filtered (odd respectively even overtones filtered). In an AB-test the CI-users will be tested if they can distinguish between the stimuli. Afterwards they rate the stimuli by the criteria "pleasantness", "musicality" and "naturalness".
    Afterwards it will be again tested, if CI-users can distinguish between temporal unmodulated stimuli and stimuli which are altered with a vibrato (mostly by the syntehtic sounds). If the test person perceives a difference, they are asked to rate this stimuli again by the criteria "pleasantness", "musicality" and "naturalness".
  •   The same set-up will be used by normal-hearing test persons.
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Characteristics

  •   Non-interventional
  •   Observational study
  •   Non-randomized controlled trial
  •   Open (masking not used)
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  •   Other
  •   Other
  •   Other
  •   N/A
  •   N/A
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Primary Outcome

The probands rate short acoustic stimuli on a 100-point slider by certain criteria. The measurement takes place immediately, after measuring the testing is completed. The objective of the study is the data capturing of pleasantness, musicality and naturalness of spectral filtered acoustic stimuli. The study takes approximately 20-30 minutes.

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Secondary Outcome

The probands give information on their listening habits via an questionnaire.

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Countries of Recruitment

  •   Germany
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Locations of Recruitment

  • Medical Center 
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Recruitment

  •   Planned
  •   2019/10/03
  •   15
  •   Monocenter trial
  •   National
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Inclusion Criteria

  •   Both, male and female
  •   18   Years
  •   no maximum age
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Additional Inclusion Criteria

Supply by one of the following CI-models:
- Firma Cochlear: Nucleus 5, Nucleus 6; Nucleus 7
- Firma MED-EL: Sonnet, Opus; Rondo I und II
Supply time ≥ 6 months

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Exclusion Criteria

none

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Addresses

  • start of 1:1-Block address primary-sponsor
    • Institut für Musikwissenschaft und Musikpädagogik Universität Osnabrück
    • Mr.  Maxim  Fischer 
    • Neuer Graben 29
    • 49074  Osnabrück
    • Germany
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    • Institut für Musikwissenschaft und Musikpädagogik Universität Osnabrück
    • Mr.  Maxim  Fischer 
    • Neuer Graben 29
    • 49074  Osnabrück
    • Germany
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    • Hörzentrum der Univ.-HNO-Klinik Düsseldorf Geb. 13.76, 1. OG, Raum 204
    • Ms.  Dipl. Ing.  Simone  Volpert 
    • Moorenstr. 5
    • 40225  Düsseldorf
    • Germany
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Sources of Monetary or Material Support

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    • Institut für Musikwissenschaft und Musikpädagogik Universität Osnabrück
    • Mr.  Maxim  Fischer 
    • Neuer Graben 29
    • 49074  Osnabrück
    • Germany
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Status

  •   Recruiting ongoing
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Trial Publications, Results and other Documents

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