An acoustic key to eight languages/dialects: Factor analyses of critical-band-filtered speech.

ABSTRACT: The peripheral auditory system functions like a frequency analyser, often modelled as a bank of non-overlapping band-pass filters called critical bands; 20 bands are necessary for simulating frequency resolution of the ear within an ordinary frequency range of speech (up to 7,000?Hz). A far smaller number of filters seemed sufficient, however, to re-synthesise intelligible speech sentences with power fluctuations of the speech signals passing through them; nevertheless, the number and frequency ranges of the frequency bands for efficient speech communication are yet unknown. We derived four common frequency bands-covering approximately 50-540, 540-1,700, 1,700-3,300, and above 3,300?Hz-from factor analyses of spectral fluctuations in eight different spoken languages/dialects. The analyses robustly led to three factors common to all languages investigated-the low &mid-high factor related to the two separate frequency ranges of 50-540 and 1,700-3,300?Hz, the mid-low factor the range of 540-1,700?Hz, and the high factor the range above 3,300?Hz-in these different languages/dialects, suggesting a language universal.

SUBMITTER: Ueda K 

PROVIDER: S-EPMC5309770 | biostudies-literature | 2017 Feb

REPOSITORIES: biostudies-literature