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Sensitivity of Two-Mass Vocal Fold Model with Acoustical Coupling to Input and Signal Parameters

This study explores the relationship between input parameters in the two-mass vocal fold model with acoustical coupling and signal parameters of the glottal flow. The sensitivity of the model to different input and signal parameters is assessed in terms of vocal quality parameters.

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Sensitivity of Two-Mass Vocal Fold Model with Acoustical Coupling to Input and Signal Parameters

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  1. On the relationship between input parameters in the two-mass vocal-fold model with acoustical coupling and signal parameters of the glottal flow A. Van Hirtum1, I. Lopez2, M. Hirschberg2, X. Pelorson1 1ICP, INPG, Grenoble, France 2TUE, Eindhoven, The Netherlands

  2. synthesis production analysis generative model physical model Introduction voiced sound glottal volume air flow (Ug)

  3. generative model physical model acoustical signal physiology & fluid flow generativefunction two-mass model Introduction simplification of reality glottal volume air flow (Ug)

  4. Objective To assess the sensitivity of the two-mass model with acoustical coupling to the input-parameters

  5. Objective input parameters (I) (physiology, fluid flow, intrinsic) signal parameters (S) (acoustical signal, intrinsic) physical two-mass model (Lous) generative function (LF) glottal volume flow Ug glottal volume flow Ug voice quality parameters (time)

  6. vocal fold Two-mass vocal fold model sub-glottal (trachea h0) hc supra-glottal (vocal tract h3) y K1, ξ1 Psub mtot K2, ξ2 x physiology mechanics fluid flow

  7. Vocal tract configuration /a/ /i/

  8. Signal time-parameters /a/ (S) U0 ,D0 , F0 , Te , Ta, Ag (hmin) Q0=t0/T0 Qs=tp/tn Qr=Ap/An Qm=U0/D0

  9. Relative sensitivity index

  10. Two-mass model input parameter reference values (I)

  11. Reference signal parameters from Ug (dUg)

  12. Sensitivity /i/ F0 Q0 /a/ Qs Qr U0 D0 Qm Te Ta hmin >600

  13. /i/ F0 Q0 /a/ Qs Qr U0 D0 Qm Te Ta hmin

  14. /a/ F0 Q0 /i/ Qs Qr U0 D0 Qm Te Ta hmin

  15. /a/ F0 Q0 /i/ Qs Qr U0 D0 Qm Te Ta hmin

  16. Conclusion • sensitivity of the input-parameters of physical two-mass • model on signal-parameters is quantified in terms of • vocal quality parameters and 4 Liljencrants-Fant • input parameters • influence of vocal tract shape on the sensitivity

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