Ultrasound Tongue Imaging Dataset for Vowel Articulation in Tibetan Lhasa Dialect

The study employed dynamic ultrasound tongue imaging technology to synchronously capture articulatory organ (tongue) movement data from native speakers. Data collection was conducted in a standard recording studio environment with two Lhasa-native participants (1 males, 1 females), all university students with Lhasa Dialect as their mother tongue and free of speech disorders.

The experiment utilized B-mode ultrasound equipment (probe frequency: 5.0 MHz) to record real-time tongue movement images during articulation, paired with high-fidelity audio recording devices (sampling rate: 44.1 kHz) to capture speech signals. The dataset includes eight monophthongs ([a], [i], [u], [e], [ø], [ɛ], [y], [o]) and two diphthongs ([au], [iu]), yielding 200 valid data units (including ultrasound videos, audio recordings, and corresponding text annotations).