This paper reports on the study of the phonetic features of the glottal explosive (?] ol* the Japanese Ryukyu dialect. First, we analyzed wave forms of minimal pair words concerned with the glottal explosive (/?/) and without (expressed by II). It was found that the pitch and the power rose in 10ms to 20ms at the beginning of the words with /?/ and 120ms to 130ms of the words with /7. Next, we performed listening tests using synthesized speech to evaluate the perceptional contribution of pitch, spectrum and power patterns to the phonetic discrimination. It was found that the contribution was greater in the order of pitch, spectrum and power. A further listening test was performed, and it was found that the discriminative threshold between the phonemes of the rising pitch was about 50ms.
Bibliographic reference. Takara, Tomio (1995): "Experimental study on perception of the glottal explosive of the Japanese ryukyu dialect", In EUROSPEECH-1995, 953-956.