Published April 2025 | Version v3
Dataset Open

Japanese Vowel Length Acoustic Data

Authors/Creators

  • 1. ROR icon University of Tsukuba

Description

This dataset contains detailed acoustic measurements of Japanese long and short vowels, as reported in Yazawa and Kondo (2019).

Speakers

16 native speakers of Tokyo Japanese (8 male, 8 female), aged between 21 and 30 years.

Materials

The materials consisted of disyllabic nonce words of the form /C1V1C2V2/, produced in isolation and within a carrier sentence (see ReadingList.txt).

  • V1 (target vowel): Long (/ii, ee, aa, oo, uu/) and short (/i, e, a, o, u/)
  • C1 & C2 (consonantal context): /b_p/, /d_t/, /g_k/, /z_s/, /h_d/
  • V2 (following vowel): /e/ and /o/

Acoustic parameters

The following acoustic parameters were extracted:

  • Duration
  • Formant frequencies (F1, F2, F3) measured using Praat
    • Fn_Midpoint: the nth formant measured at the temporal midpoint of each vowel interval
    • Fn_x: the nth formant measured at the xth of 30 equidistant points within the central 60% of the vowel interval

Files

JPLongShortVowels.csv

Files (3.7 MB)

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Additional details

References

  • Yazawa, K., & Kondo, M. (2019). Acoustic characteristics of Japanese short and long vowels: Formant displacement effect revisited. In S. Calhoun, P. Escudero, M. Tabain, & P. Warren (Eds.), Proceedings of the 19th International Congress of Phonetic Sciences (pp. 671–675). Australian Speech Science and Technology Association Inc.