Oldenburg sentence test

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The Oldenburg sentence test (“ OLSA ” for short ) is an audiometric method that examines the intelligibility of sentences in background noise .

In a noisy environment, people who are hard of hearing usually have disproportionately greater problems understanding speech than people with normal hearing. In order to realistically capture this situation, the Oldenburg sentence test is used to test the intelligibility of speech in background noise, whereby not individual words, as in the Freiburg word test , but entire sentences are presented as useful signals. Speech-simulating noise is used as the background noise. Useful sound and interference sound are offered via separate loudspeakers. The test can be used in hearing diagnostics and hearing aid fitting .

The language material of the Oldenburg sentence test consists of 40 test lists of 30 sentences each. The sentences have the following form: Name Verb Number Adjective Object with a random combination from an inventory of 50 words in total. The sentences are not necessarily meaningful, so they are not easy to remember, which is why they can be used to measure repeatedly. The test which is S prach V erständlichkeits S chwelle in noise (SVS, 50% corresponds to speech intelligibility) by means of an adaptive control determines d. H. the level of speech is changed according to the respondent's answer. The background noise is presented at a fixed level (usually 65  dB ).

The result of the test is the speech intelligibility threshold (SVS) in the background noise in dB S / N (signal-to-noise ratio, which leads to 50% intelligibility).

By positioning the loudspeakers differently, the benefit that the test person can derive from the spatial resolution of speech and background noise through binaural hearing can be quantified. For this purpose, the difference in the speech intelligibility threshold between presentation of speech from the front and background noise from the side and the speech intelligibility threshold when speech and background noise are presented from the front is determined.

Similar to the Döring test , the advantage of a two-ear hearing aid supply compared to a monaural supply can be illustrated if one or two hearing aids are used instead of the different loudspeaker positions during the measurement.

literature

  • Ernst Lehnhardt , Roland Laszig (ed.): Practice of Audiometry . 8th edition. Thieme, Stuttgart 2001, ISBN 3-13-369008-6 .
  • Oldenburg sentence test. Manual and background knowledge. Version of July 25, 2000. HörTech gGmbH, Oldenburg