Dichotic hearing

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Under Dichotischem hearing ( you - ot -isch of Greek δίχα, two, separately and ὠτ- (strain), ear) means listening to simultaneously presented, but different page aural signals. In the dichotic hearing test, the test person hears different words (or short sentences) in each ear at the same time and is then asked to repeat them one after the other, which is normally possible. An abnormal result suggests a disorder of hearing processing in the brain. The dichotic listening ability improves speech understanding compared to monaural listening, especially in noisy environments.

The test of dichotic language comprehension can e.g. B. can be used to study language through lateralization . It is z. B. the reaction time or the hit rate compared when a signal was presented to the right or left ear. In the case of faster or more accurate processing of a signal presented on the right side, one speaks of a right ear advantage (advantage of the right ear, abbreviated REA) and it can then be concluded that the signal is processed hemispherically dominant on the left .

Tests available in Germany are, for example, the Feldmann test for adults and the Uttenweiler test for children, in which polysyllabic words (e.g. the stove pipe - the picket fence ) are presented simultaneously. The classic test evaluation is based on counting the correct and laterally incorrect word pairs (analogous to speech audiometry ). A working group at the University Clinic in Marburg has modified evaluation methods that give dichotic hearing more weight.

literature

  • Cherry, CE (1953). Some Experiments on the Recognition of Speech, with One and with Two Ears. Journal Of The Acoustical Society Of America, 25, 975-979
  • Bryden, P. (1982). Laterality - functional asymmetry in the intact brain. New York: Academic Press
  • Lehnhardt E., Roland Laszig (Ed.): Practice of Audiometry, 8th edition, chap. 15: Central hearing diagnostics , Thieme Verlag, Stuttgart 2001

Individual evidence

  1. ↑ Antje Hochweller: Investigation of the standard survey of the dichotic discrimination test according to Uttenweiler and the Marburg rhyme test for the diagnosis of auditory perception disorders in children. Diss. Department of Medicine at the Phillips University of Marburg, 2006
  2. ↑ R. Berger and T. Demirakca: Comparison between the old and new evaluation mode in the dichotic discrimination test. ENT Volume 48, Number 5 / May 2000
  3. ↑ H. de Maddalena, M. Watzlawick-Schumacher, C. Schmitz-Salue, R. Arold: The dichotic discrimination tests of Feldmann and Uttenweiler: Which test should be used in children aged 8 to 10? Oto-Rhino-Laryngologia Nova Vol. 11, No. 6, 2001

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