An automated multiple choice intelligibility testing system
Abstract
The test material used is the Modified Rhyme Test and the Clarke's Vowel Test (CVT). The MRT consists of groups of single syllable words which differ only in their initial or final consonant; for the CVT only the vowel is different. The relative performance of various noise cancelling microphones was compared by recording MRT and CVT word lists against a background of rotary wing noise provided using a prerecorded sample formed into a tape loop. The word lists were then replayed to subjects, seated in the same noise environment used for the recordings, through a communications headset with attenuation properties similar to helmets used in rotary wing aircraft. Subjects were required to select the word they thought they heard from a group of six words (five in the case of the CVT) presented on a Visual Display Unit (VDU). It is suggested that subjects' reaction time, when used in conjunction with the percentage correct score, may assist in discriminating between microphones of comparable performance.
- Publication:
-
In AGARD Aural Commun. in Aviation 3 p (SEE N81-31449 22-32
- Pub Date:
- June 1981
- Bibcode:
- 1981aca..agar.....P
- Keywords:
-
- Aircraft Noise;
- Intelligibility;
- Microphones;
- Performance Tests;
- Voice Communication;
- Communication Equipment;
- Helmets;
- Human Factors Engineering;
- Signal To Noise Ratios;
- Communications and Radar