Head voice is produced by a combination of lighter chest voice techniques and a falsetto pull, creating a resonant tone in the head. Essentially, it's a controlled mixture of chest tension and falsetto that allows singers to reach higher notes with a lighter, brighter quality.
Here's a breakdown of the process:
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Vocal Fold Engagement: The vocal folds come together to create a clear sound, but with less mass and tension than in chest voice. This allows for a lighter and more flexible vibration.
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Chest Tension & Falsetto Pull: There's just enough tension in the body of the vocal folds to maintain a sense of connection and substance. Simultaneously, a "falsetto pull" (vocal fold lengthening) helps to thin the vocal folds, enabling the higher pitch.
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Resonance: The sound resonates primarily in the head, specifically in the sinuses and skull, contributing to the bright, airy quality characteristic of head voice.
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Breath Control: Proper breath support is crucial for maintaining a consistent and controlled head voice. A stable airflow helps prevent the voice from becoming breathy or strained.
Think of it as finding a balance: enough closure to maintain a clear tone, enough stretch to reach the high notes, and enough resonance to project the sound effectively. Many singers strive to bridge the gap between chest and head voice to create a smooth and seamless vocal range.