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However, there is still limited knowledge regarding the acoustic characteristics associated with aspiration-based tone splitting. This study aims to investigate the acoustic cues related to the tonal registers and laryngeal configurations in Donglei Kam, a dialect of Southern Kam. Sixteen native speakers of Donglei Kam participated, producing lexical tones. Statistical analyses were conducted to examine the acoustic distinctions between tonal registers, using measurements of voice onset time, spectral tilt, noise, and energy. The results indicated that Donglei Kam retained a two-way contrast of aspiration, albeit with a trend toward gradual loss. Additionally, a breathy voice was detected in the Ciyin tonal register, characterized by elevated spectral tilt values and spectral noise throughout the vowels. Moreover, machine learning classifiers effectively identified tonal registers using voice-quality data, suggesting that the phonation contrast between breathy and modal voice could contribute to the tonal split alongside pitch contrast. In summary, these findings enhance our understanding of the acoustic implementation of breathiness in Kam and offer valuable insights into the role of laryngeal contrast in tonal splits.<\/jats:p>","DOI":"10.1121\/10.0028009","type":"journal-article","created":{"date-parts":[[2024,7,25]],"date-time":"2024-07-25T11:24:06Z","timestamp":1721906646000},"page":"655-671","update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":3,"title":["An investigation of acoustic cues to tonal registers and voicing in Donglei Kam"],"prefix":"10.1121","volume":"156","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2304-9854","authenticated-orcid":false,"given":"Chengyu","family":"Guo","sequence":"first","affiliation":[{"name":"Faculty of Arts and Sciences, Beijing Normal University 1 , Zhuhai 519087, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4500-2590","authenticated-orcid":false,"given":"Fei","family":"Chen","sequence":"additional","affiliation":[{"name":"School of Foreign Languages, Hunan University 2 , Changsha 410082, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chen","family":"Kuang","sequence":"additional","affiliation":[{"name":"School of Foreign Languages, Hunan University 2 , Changsha 410082, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Longjie","family":"Dong","sequence":"additional","affiliation":[{"name":"School of Foreign Languages, Hunan University 2 , Changsha 410082, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"231","published-online":{"date-parts":[[2024,7,25]]},"reference":[{"key":"2024073117052645800_c1","unstructured":"Bao, \nZ. 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