Medicine:Diplophonia
From HandWiki
Diplophonia, also known as diphthongia, is a phenomenon in which a voice is perceived as being produced with two concurrent pitches.[1] Diplophonia is a result of vocal fold vibrations that are quasi-periodic in nature.[2] It has been reported from old days, but there is no uniform interpretation of established mechanisms.[3] It has been established that diplophonia can be caused by various vocal fold pathologies, such as vocal folds polyp, vocal fold nodule, recurrent laryngeal nerve paralysis[3] or vestibular fold hypertrophy.[4]
The Voice Quality Symbol for diplophonia is V̬‼.
References
- ↑ Ward; Sanders; Goldman; Moore (1969). "Diplophonia". The Annals of Otology, Rhinology, and Laryngology 78 (4): 771–777. doi:10.1177/000348946907800409. PMID 5799401.
- ↑ Kiritani; Hirose; Imagawa (1993). "High-speed digital image analysis of vocal cord vibration in diplophonia". Speech Communication 13 (1–2): 23–32. doi:10.1016/0167-6393(93)90056-Q.
- ↑ 3.0 3.1 吉岡博英 (1987). "二重声の成立機序に関する音響的側面について" (in Japanese). 筑波大学. https://tsukuba.repo.nii.ac.jp/?action=repository_uri&item_id=1393&file_id=17&file_no=1. Retrieved 2015-12-26.
- ↑ "仮声帯肥大" (in Japanese). sickness-dictionary.jp. http://www.sickness-dictionary.jp/nosethroat/karisetaihidai.html. Retrieved 2015-12-26.
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