Diplophonia
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]
References[edit | edit source]
- ↑ Ward, Diplophonia, The Annals of Otology, Rhinology, and Laryngology, 1969, Vol. 78
- ↑ Kiritani, High-speed digital image analysis of vocal cord vibration in diplophonia, Speech Communication, 1993, Vol. 13
- ↑ 3.0 3.1 二重声の成立機序に関する音響的側面について Full text, 吉岡博英, , 筑波大学, 1987,
- ↑ 仮声帯肥大 Full text, , sickness-dictionary.jp,
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