RESUMEN
This study investigates three aspirated voiceless stop consonants and their unaspirated counterparts produced in Taiwan's Southern Min dialect by 10 laryngeal speakers (LA), 10 speakers with pneumatic artificial larynxes (PA), and 10 oesophageal speakers (ES). Listeners' perceptions of the accuracy of the three groups in producing these six stop consonants were also examined. Each of the voiceless stop consonants /p, pÊ°, t, tÊ°, k, kÊ°/, followed by the vowel /a/, was represented by a Southern Min character and appeared three times on a list in random order. Each character had a consonant-vowel syllable structure, and all were read with Tone 1 (high and level). Voice onset time (VOT) was measured for each stop consonant. A separate group of 20 listeners was then asked to identify the consonants produced by the LA, PA, and ES speakers. The VOT values of aspirated voiceless stop consonants from PA and ES were shorter than those from LA. Although PA and ES had aspiration contrast in their VOT values, perceived accuracy was low for PA (/pÊ°/: 16.3%; /tÊ°/: 13.5%; /kÊ°/: 22.8%) and ES (/pÊ°/: 33.7%; /tÊ°/: 25.9%; /kÊ°/: 31.9%). The mean percentages of correctly identified /pÊ°, tÊ°, kÊ°/ produced by PA were at chance level. In terms of VOT values, it is recommended that, when producing aspirated voiceless stop consonants, PA and ES elongate the duration between the release of the oral constriction and the onset of their vibratory sound source. Moreover, it is also recommended that further investigation into other phonetic properties that support stop contrast is needed.
Asunto(s)
Acústica del Lenguaje , Voz , Acústica , Humanos , Percepción , Fonética , TaiwánRESUMEN
OBJECTIVE: To summarize guidelines on self-care and clinical management of persons with laryngectomy during the COVID-19 pandemic. METHOD: Articles published in electronic databases-PubMed, Scopus, Web of Science, and CINHAL with the compliant keywords-were scouted from December 2019 to November 2020. All original articles, letters to editors, reviews, and consensus statements were reviewed and included. RESULTS: In all, 20 articles that had information pertaining to self-care of persons with laryngectomy or guidelines for clinicians working with this population were identified. Four of the included studies were case reports of persons with laryngectomy who contracted the COVID-19 virus. One of the included articles was a cohort study that explored the use of telerehabilitation in persons with laryngectomy. CONCLUSION: The hallmarks of preventative strategies for persons with laryngectomy during the COVID-19 pandemic are as follows: physical distancing, use of a three-ply mask or surgical mask to cover the mouth and nose, and use of Heat Moisture Exchange (HME) device over stoma in addition to covering it with a surgical mask or laryngectomy bib. Telerehabilitation, not a preference with this population prior to the pandemic, has gained popularity and acceptance during the COVID-19 situation. The reports of COVID-positive persons with laryngectomy have indicated contrary findings from the tracheal and nasal swabs, necessitating compulsory inclusion of both nasal and tracheal swabs.