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First received: August 11, 2025

Clinical Trial: Effects of Finger Kazoo Exercise With and Without Oropharyngeal Enlargement in the Operatic Singing Voice

Study Status: COMPLETED

Recruit Status: COMPLETED

Condition: Voice Alteration

Study Type: INTERVENTIONAL


Official Title: Effects of Finger Kazoo Exercise With and Without Oropharyngeal Enlargement in the Operatic Singing Voice: A Randomized, Single-Blind, Crossover Controlled Clinical Trial

Brief Summary: This clinical trial aimed to evaluate the effects of the semi-occluded vocal tract exercise Finger Kazoo (FK), with and without oropharyngeal expansion, on the singing voice.Fifteen classically trained singers, screened using the Singing Voice Handicap Index-10 (SVHI-10), participated in a randomized, single-blind, crossover trial with two experimental sessions separated by 48 hours.Participants were randomized via Sealed Envelope to start in Condition A (without oropharyngeal expansion) or Condition B (with…

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