A sensitive test of speech communication quality
Small differences in quality may affect the ease with which various speech samples can be understood even though they are all highly intelligible according to articulation tests. Such quality differences were reliably discriminated by a speech-interference test which determined how easily the speech...
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Veröffentlicht in: | The Journal of the Acoustical Society of America 1973-04, Vol.53 (4), p.1083-1092 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | Small differences in quality may affect the ease with which various speech samples can be understood even though they are all highly intelligible according to articulation tests. Such quality differences were reliably discriminated by a speech-interference test which determined how easily the speech samples could be heard against a background of interfering speech. The communication quality of a degraded speech sample was measured by the difference, A = T − T0, where T and T0 were the interference thresholds for the degraded and reference speech, respectively. An interference threshold was defined as the value of the signal-to-interference intensity ratio where the signal speech was 50% intelligible in the presence of interfering speech. Q measures and subjective quality ratings were obtained for speech degraded by low- and high-pass filtering, additive noise, and transmission over a telephone line. The Q measures successfully discriminated differences in speech quality, and were monotonically related to the ratings, thereby validating the speech interference test for speech-quality evaluation. |
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ISSN: | 0001-4966 1520-8524 |
DOI: | 10.1121/1.1913428 |