Soprano singing, with and without resonances

Wade, Laura; Hanna, Noël; Smith, John R. Lindsay; Wolfe, Joe

doi:10.1121/2.0000354

Cited by 1 publication

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“…The measured DC resistance of the pipe is low (around 0.7 to 0.8 MPa s m À3 ) and does not cause inconvenience to the subjects during exhalation and singing. In related experiments (Wade et al, 2016), subjects similarly reported no inconvenience when singing sustained notes at a wide variety of pitches into the infinite pipe, however, they experienced various instabilities when R1 was suddenly introduced by rapidly pulling a plug from the side of the infinite pipe close to the lips.…”

Section: The "Infinite" Pipementioning

confidence: 87%

The role of vocal tract and subglottal resonances in producing vocal instabilities

Wade

Hanna

Smith

et al. 2017

The Journal of the Acoustical Society of America

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During speech and singing, the vibrating vocal folds are acoustically loaded by resonant ducts upstream (the trachea) and downstream (the vocal tract). Some models suggest that the vocal fold vibration (at frequency f) is more stable at frequencies below that of a vocal tract resonance, so that the downstream load is inertive (mass-like). If so, vocal fold vibration might become unstable when f and resonance frequencies "cross over" and the load varies rapidly in phase and magnitude. In one experiment, singers produced a slow diphthong at constant pitch, thus shifting the first tract resonance R1 across fixed f. In another, pitch glides took f across the tract and subglottal resonances. Few instabilities occurred when singers could change lip geometry and thus alter R1. This suggests that avoiding resonance crossings can aid vibrational stability. In experiments in which R1 was constrained using a mouth ring, instabilities occurred at frequencies above R1. When subjects sang into an acoustically infinite pipe, which provided a purely resistive load at the lips, R1 was eliminated. Here, instabilities were reduced and concentrated near the lower limit of the head voice.

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Section: The "Infinite" Pipementioning

confidence: 87%