Clinical Voice Assessment and Instrumental Measures Study Guide: Auditory Perceptual and Instrumental Measures Technical and Instrumental Measures

Clinical Knowledge Gap: It is noted that voice disorders are a specialized area. Even if an athlete or patient presents with a voice issue, the clinician may not know how to treat it. It is estimated that perhaps simple half of the clinical population, or even less, knows how to properly manage voice cases.
Objective Nature of Voice: One benefit of voice work is that it is often "black and white." Assessment focuses on determining if a problem is present or not, whether the voice is correct or incorrect, and proving those findings.
Assessment Goals:
- To hear and identify if a problem exists in the voice.
- To find ways to prove the existence of that problem.
- To track the course of treatment by proving that the issue is either improved or resolved.

Auditory Perceptual Measures: This involves using the clinician's ear to hear, describe, and identify red flags in what is happening with the voice.
Instrumental Measures: These measures are used to validate the clinician's perception.
Integration: Best practice requires using both measures rather than choosing one or the other. This provides a "full picture." Clinicians should hear a red flag first and then use the instrumental measures specifically in those areas to avoid unnecessary testing that insurance will not cover.

GRBAS:
- Description: A categorical screener used to identify if there is a problem or a severity level.
- Categories: It assesses five specific areas: Grade, Roughness, Breathiness, Asthenia (Weakness), and Strain.
- Limitations: It is very quick to administer but lacks nuance. Some clinicians feel it lacks validity because it often just confirms that "something is wrong" without providing deep detail.
- Scoring: Typically provides a 0, 1, 2, or 3 rating (e.g., moderate problem), which can be vague.
The K-five (CAPE-V):
- Description: A deep, nuanced screening tool that functions similarly to a standardized test, although the score remains perceptual (based on clinician opinion).
- Capabilities: Metrics are separated for grading (e.g., prosody, frequency, habitual pitch), providing a more nuanced score that can justify services or measure therapy progress/maintenance.
- Tasks: Includes specific tasks to justify sounds that are historically difficult to measure purely by ear, such as loudness and perturbation (jitter and shimmer).
- Resources: An infographic from the show Arrested Development is provided in the course modules as a summary resource for the K-five.

Function: Visi-Pitch leverages visual biofeedback. It is used in both assessment (monitoring perceptual characteristics and sound waves) and treatment (monitoring adjustments).
Limitations: It cannot stand alone as a diagnostic tool. Clinicians must not over-rely on Visi-Pitch scores or generalize them without clinical intuition, as the tool does not explain why a problem is occurring or what exactly should be changed.
The Macro View (Real-Time Pitch): Focuses on the overall sound wave output.
- Habitual Pitch: Speaking outside of this range causes increased tension, rubbing the vocal folds incorrectly, which can lead to nodules.
- Maximum Phonation Time (MPT): Measures respiratory and phonatory efficiency.
- Prosody and Reading.
- Pitch Range Restrictions: Checks for pathology or effects of aging.
- Loudness: Examines amplitude and energy levels (frequency and amplitude).
The Micro View: Focuses on the efficiency of vocal fold closures and lung power.
- Checks the efficiency of the model closure and subglottal pressure.
- Evaluates the ability to sustain phonation.

Execution Steps in Visi-Pitch:
1. Launch the program.
2. Pick the specific test.
3. Press "Capture" (Note: Use the button labeled "Capture," not "Record").
4. Click again to generate results.
5. Copy the results from the screen.
Signal Quality Indicators:
- Green Signal: Indicates good quality and valid data.
- Red Signal: Indicates poor quality or insufficient signal. The program will not analyze red signals. Any recording containing red segments is considered invalid for clinical protocols.

Jitter (Frequency):
- Refers to problems in the fundamental frequency.
- Indicates that pitch is inconsistent and sound waves are irregular.
- Occurs when vocal folds do not open and close in a steady, programmed sequence.
- Acoustic Result: Voice sounds hoarse, unsteady, or rough.
Shimmer (Amplitude):
- Refers to problems in loudness or amplitude.
- The sound wave may be regular in sequence, but the height (amplitude) is irregular.
- Often tied to unregulated subglottal pressure.
Clinical Correlates:
- Nodules: Often correlated with Jitter.
- Hyperkinetic Disorders: Often correlated with Shimmer.
Perturbation Definition: General noise or poor quality in the voice sound.
Key Indices: Relative Average Perturbation (RAP), Noise to Harmonic Ratio (NHR), and Voice Turbulence Index (VTI). These are used to determine which part of the voice is failing (e.g., efficiency, closure, or breath endurance) to help tailor treatment or determine if surgery is necessary.

Function: Norms are guides/reference points, not objective truths.
Influencing Factors:
- Lung Capacity: Men generally have larger lung capacities and deeper voices.
- Physical Size: Taller/larger women may have higher maximum phonation times than smaller women.
- Context: Cultural, structural, and personal preferences must be considered. Being "outside of the norm" does not automatically qualify as a disorder.

Question on Nuance: The clinician clarified that while GRBAS might give a score of "moderate problem," the K-five specifies exactly where the problem is (e.g., prosody vs. habitual pitch), which tells the clinician which Visi-Pitch tool to use.
Question on Jitter vs. Shimmer: They usually occur independently. However, in severe disorders, both may be present.
Question on Signal Redness: Red signals occur because the voice signal (amplitude or quality) is poor, or the person did not speak long enough.
Class Logistics:
- Students are required to test each other using the reporting form (due next week).
- Discussion regarding starting the class earlier to accommodate schedules (specifically mention of "PBS" for the clinician's children and campus availability).
- Clinician is open to skipping breaks to finish early if the entire group agrees.