Modeling source-filter interaction in belting and high-pitched operatic male singing

Area of Science:

• Acoustic phonetics
• Vocal pedagogy

Background:

• Acoustic differences exist between operatic and belting singing styles at high pitches.
• Vocal tract shapes and their acoustic effects are crucial for understanding singing production.

Purpose of the Study:

• To explain acoustic differences in male high-pitch singing (operatic vs. belting) using nonlinear source-filter theory.
• To investigate how stylized vocal tract shapes influence harmonic reinforcement in different singing styles.

Main Methods:

• Application of nonlinear source-filter theory to analyze singing acoustics.
• Modeling stylized vocal tract shapes (caricatures) for operatic and belting styles.
• Inference of vocal tract area functions and reactances from artist lip opening examples.

Main Results:

• Operatic singing may utilize an inverted megaphone shape to elevate harmonics above the first formant.
• Belting consistently employs a megaphone shape, keeping the fundamental and second harmonic below the first formant.
• Both styles leverage vocal tract shapes for harmonic reinforcement via supraglottal and subglottal reactances.

Conclusions:

• Vocal tract configurations significantly differentiate operatic and belting singing acoustics.
• Source-filter theory provides a framework for understanding style-specific vocal production mechanisms.
• Stylized vocal tract shapes are key to achieving distinct acoustic outcomes in high-pitch singing.