Diplophonia: Difference between revisions

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'''Diplophonia,''' also known as diphthongia, is a phenomenon in which a voice is perceived as being produced with two concurrent pitches.<ref>{{Cite journal|last = Ward|last2 = Sanders|last3 = Goldman|last4 = Moore|year = 1969|title = Diplophonia|journal = The Annals of Otology, Rhinology, and Laryngology|volume = 78}}</ref> Diplophonia is a result of vocal fold vibrations that are quasi-periodic in nature.<ref>{{Cite journal|last = Kiritani|last2 = Hirose|last3 = Imagawa|year = 1993|title = High-speed digital image analysis of vocal cord vibration in diplophonia|journal = Speech Communication|volume = 13}}</ref> It has been reported from old days, but there is no uniform interpretation of established mechanisms.<ref name="Yoshioka 1987">{{Cite web|url=https://tsukuba.repo.nii.ac.jp/?action=repository_uri&item_id=1393&file_id=17&file_no=1|title=二重声の成立機序に関する音響的側面について|author=吉岡博英|publisher=筑波大学|accessdate=2015-12-26|date=1987|language=Japanese}}</ref> It has been established that diplophonia can be caused by various vocal fold pathologies, such as [[vocal folds]] [[polyp (medicine)|polyp]], [[vocal fold nodule]], [[recurrent laryngeal nerve]] paralysis<ref name="Yoshioka 1987" /> or [[vestibular fold]] hypertrophy.<ref name="sickness-dictionary">{{Cite web|url=http://www.sickness-dictionary.jp/nosethroat/karisetaihidai.html|publisher=sickness-dictionary.jp|title=仮声帯肥大|accessdate=2015-12-26|language=Japanese|archive-url=https://web.archive.org/web/20160304081444/http://www.sickness-dictionary.jp/nosethroat/karisetaihidai.html|archive-date=2016-03-04|url-status=dead}}</ref>
{{Short description|A voice disorder characterized by the perception of two distinct pitches}}


==References==
'''Diplophonia''' is a [[voice disorder]] characterized by the perception of two distinct pitches during phonation. This condition occurs when the vocal folds produce two different frequencies simultaneously, leading to a "double voice" effect. Diplophonia can be caused by various factors affecting the [[larynx]] and vocal fold vibration.
<references/>


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==Causes==
Diplophonia can result from several underlying conditions that affect the normal vibration of the [[vocal folds]]. Common causes include:


[[Category:Respiratory diseases]]
* '''[[Vocal fold paralysis]]''': When one or both vocal folds are paralyzed, they may not vibrate symmetrically, leading to diplophonia.
* '''[[Vocal fold nodules]] or [[polyps]]''': These benign growths can cause irregularities in vocal fold vibration.
* '''[[Laryngitis]]''': Inflammation of the larynx can alter the tension and mass of the vocal folds, resulting in diplophonia.
* '''[[Muscle tension dysphonia]]''': Excessive tension in the laryngeal muscles can disrupt normal vocal fold vibration.
* '''[[Reinke's edema]]''': Swelling of the vocal folds can lead to asymmetrical vibration.


==Symptoms==
The primary symptom of diplophonia is the perception of two distinct pitches during speech or singing. This can make the voice sound hoarse, rough, or "double." Other symptoms may include:


{{Med-stub}}
* Vocal fatigue
{{No image}}
* Hoarseness
* Difficulty controlling pitch
* Strain or discomfort while speaking
 
==Diagnosis==
Diagnosis of diplophonia typically involves a thorough evaluation by an [[otolaryngologist]] or a [[speech-language pathologist]]. The assessment may include:
 
* '''[[Laryngoscopy]]''': A procedure to visualize the vocal folds and assess their function.
* '''[[Stroboscopy]]''': A specialized technique that uses a strobe light to observe vocal fold vibration in slow motion.
* '''[[Acoustic analysis]]''': Analyzing the sound of the voice to identify irregularities in pitch and frequency.
 
==Treatment==
Treatment for diplophonia depends on the underlying cause. Options may include:
 
* '''[[Voice therapy]]''': Conducted by a speech-language pathologist to improve vocal technique and reduce strain.
* '''[[Surgical intervention]]''': In cases where structural abnormalities like nodules or polyps are present, surgery may be necessary.
* '''[[Medical management]]''': Treating underlying conditions such as laryngitis or reflux that may contribute to diplophonia.
 
==Prognosis==
The prognosis for diplophonia varies depending on the cause and the effectiveness of treatment. Many individuals experience significant improvement with appropriate therapy and management.
 
==Related pages==
* [[Voice disorders]]
* [[Larynx]]
* [[Vocal fold]]
* [[Speech-language pathology]]
 
[[Category:Voice disorders]]

Latest revision as of 19:24, 22 March 2025

A voice disorder characterized by the perception of two distinct pitches


Diplophonia is a voice disorder characterized by the perception of two distinct pitches during phonation. This condition occurs when the vocal folds produce two different frequencies simultaneously, leading to a "double voice" effect. Diplophonia can be caused by various factors affecting the larynx and vocal fold vibration.

Causes[edit]

Diplophonia can result from several underlying conditions that affect the normal vibration of the vocal folds. Common causes include:

  • Vocal fold paralysis: When one or both vocal folds are paralyzed, they may not vibrate symmetrically, leading to diplophonia.
  • Vocal fold nodules or polyps: These benign growths can cause irregularities in vocal fold vibration.
  • Laryngitis: Inflammation of the larynx can alter the tension and mass of the vocal folds, resulting in diplophonia.
  • Muscle tension dysphonia: Excessive tension in the laryngeal muscles can disrupt normal vocal fold vibration.
  • Reinke's edema: Swelling of the vocal folds can lead to asymmetrical vibration.

Symptoms[edit]

The primary symptom of diplophonia is the perception of two distinct pitches during speech or singing. This can make the voice sound hoarse, rough, or "double." Other symptoms may include:

  • Vocal fatigue
  • Hoarseness
  • Difficulty controlling pitch
  • Strain or discomfort while speaking

Diagnosis[edit]

Diagnosis of diplophonia typically involves a thorough evaluation by an otolaryngologist or a speech-language pathologist. The assessment may include:

  • Laryngoscopy: A procedure to visualize the vocal folds and assess their function.
  • Stroboscopy: A specialized technique that uses a strobe light to observe vocal fold vibration in slow motion.
  • Acoustic analysis: Analyzing the sound of the voice to identify irregularities in pitch and frequency.

Treatment[edit]

Treatment for diplophonia depends on the underlying cause. Options may include:

  • Voice therapy: Conducted by a speech-language pathologist to improve vocal technique and reduce strain.
  • Surgical intervention: In cases where structural abnormalities like nodules or polyps are present, surgery may be necessary.
  • Medical management: Treating underlying conditions such as laryngitis or reflux that may contribute to diplophonia.

Prognosis[edit]

The prognosis for diplophonia varies depending on the cause and the effectiveness of treatment. Many individuals experience significant improvement with appropriate therapy and management.

Related pages[edit]