Diplophonia

Diplophonia is a phenomenon where two voices with different pitch are heard simultaneously. It has been reported from old days, but there are no uniform interpretation of established mechanisms.[1] It is known that this phenomenon may be caused as a symptom of vocal folds polyp, vocal fold nodule, recurrent laryngeal nerve paralysis[1] or vestibular fold hypertrophy.[2]

References

  1. 1 2 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. Retrieved 2015-12-26.
  2. ↑ "仮声帯肥大" (in Japanese). sickness-dictionary.jp. Retrieved 2015-12-26.


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