Stroboscopy also can give an incorrect impression when the vocal folds are producing more than one periodic source, as in some cases of diplophonia
. Because of these limitations that are based in the technology of strobovideolaryngoscopy, stroboscopic examination of some voice problems is troublesome.
Vocal fold cysts may cause hoarseness, breathiness, pitch instability, diplophonia
, and compensatory hyperfunction.
, meaning "double voice," refers to a phenomenon in which two (or more) pitches are sounded simultaneously.
The physical examination was notable for a raspy voice with obvious diplophonia
and mild inspiratory stridor.
7) persistently undesirable quality such as voice breaks, burring, or diplophonia
On examination, the patient was moderately breathy and hoarse, and she experienced occasional episodes of diplophonia
, especially at the higher frequencies.
The aerodynamic turbulence of the glottic air leak is perceived as "breathiness." Voice may also have a bitonality or diplophonia
, with the perception of two different fundamental frequencies (or pitches) simultaneously.