Voice Therapy Techniques Flashcards
Resonant Voice
Any voice production that is both easy to produce and vibrant in the facial tissues
Low-impact, large-amplitude vibrations
Neither pressed nor breathy
Neither taxing nor restricted to low intensity
Resonance
a reinforcement of vocal fold vibration by the vocal tract air column
Sensations of Resonance
Bony structures pick up vibrations from acoustic standing waves in the oral cavity propagated to brain, skull, not so much the air
Sound radiates primarily from mouth and nostrils
Nonlinear Source-Filter Theory
Acoustic pressures in the vocal tract may either help or hinder vocal fold oscillation
Inertance clinical definition
occurs when there is a delay between stimulus (pulse of air from the opening TVFs) and response (acceleration of the vocal tract air column)
-this is one of the mechanisms that sustains vocal fold oscillation
Compliance
occurs when there is a response in advance of the stimulus
-this hinders sustained vocal fold oscillation (e.g., may cause voice breaks)
Inertance research definition
When compression occurs above the glottis during the opening phase, and rarefaction occurs during the closing phase, this facilitates TVF oscillation
Facilitate Inertance
Semi-occlusion of the vocal tract (SOVT)
Semi-occlusion of the vocal tract (SOVT)
already built into many successful voice therapy approaches
may be done in nonspeech and speech exercises
Theoretical effects of SOVT
Modeling studies suggest semi-occlusion may: increase vocal tract inertance (which facilitates TVF vibration), decreased PTP, increased harmonic content, increase vocal economy, decrease hyperadduction
Effects during SOVT
May alter vocal tract spaces (more inertance)
May balance laryngeal muscle activation and improve vocal economy/efficiency
May prevent large collision forces during loud voicing
Effects immediately after SOVT
Several studies suggest improved voice quality
Increased spectral energy around the singer’s formant cluster in one subject and vocal tract configuration remained changed
Treatment considerations
target population rationale (biomechanical target, mechanism of change) Credentialing requirements evidence what-how-if
Lee Silverman Voice Therapy
Population: Parkinson’s Disease (other neurogenic dysarthrias, cp, vocal fold bowling)
Target: LOUD
Rationale: singular focus on increased loudness ot increase neural drive, sensory recalibration, high intensity, quantitative feedback
Lessac-Madsen Resonant Voice Therapy
Population: hyperadduction (e.g., phonotrauma), hypoadduction (e.g., MTD, bowing, paresis)
Target: barely ab/adducted TVFs “resonant” voice quality
Rationale: uses speech-embedded semi-occlusions to train optimal vocal tract configuration for efficient/low-impact voice