lec 4 Flashcards
the mouth is a pressure node and a movement ___.
antinode
the glottis is a pressure antinode and a movement ___.
node
what is perturbation theory?
- ANLO: constriction at movement antinode = lower formant frequency.
- NORA: constriction at movement node = raises formant frequency.
how many variables are in the single helmholtz resonator?
- 3: V, L, and A
what is the problem with the single helmholtz resonator?
models only 1 resonance at a time
how many variables are in the double helmholtz resonator?
6: V1, L1, A1, V2, L2, A2
what do the 2 flasks of the double helmholtz represent?
- back cavity (F1)
- front cavity (F2)
double helmholtz: what is tongue height (constriction) related to?
- F1 (due to A1 changing)
- higher tongue = lower A1 = lower F1
- lower tongue = higher A1 = higher F1
double helmholtz: what is place of tongue constriction related to?
- F2 (due to V2 changing)
- more back = bigger V2 = lower F2
- more front = smaller V2 = higher F2
based on the tube model, perturbation theory, and double helmholtz, what would happen if you raise the pitch? intensity? F0? harmonics?
nothing bc they are not part of resonator
what makes laminar flow into turbulence?
constriction
what is reynolds number?
- helps to predict whether the flow will be laminar or turbulent
- 1800 for vocal tract
which has greater volume velocity (Vv), voiced or voiceless sounds
voiceless
what is wall or wake turbulence?
turbulence created by teeth or pocket of air below tongue
what is the effect of lack of wall turbulence on a spectrum?
lower frequency
