voice wk4

Overview of Perceptual Assessment

  • Definition: Perceptual assessment is a method of assessing patients by listening to their voice.
  • Importance: It is crucial for gaining a comprehensive understanding of the patient's voice characteristics.
  • Sensitivity: Perceptual assessment can often provide better insight than instrument evaluations alone.

Methods of Perceptual Assessment

  • Case History: Initial step in assessment where background information about the patient is gathered.
  • Instrumentation Evaluations: Utilizes various instruments, primarily acoustic analysis.

Conducting a Perceptual Assessment

  • Live Sessions: Ideally performed in person to capture accurate vocal qualities.
  • Remote Assessments: Possible via platforms like Zoom, but requires proper microphone and recording conditions to ensure clarity of sound.
Techniques for Recording Voice Samples
  1. Sample Selection:
    • Conversational Speech: Engage the patient in conversation to evaluate their natural speaking voice.
    • Singing Samples: Obtain if applicable, especially for singers or vocal professionals; however, speech-language pathologists (SLPs) should not assess singing technique unless they are additionally trained in that area.
  2. Sustained Vowels:
    • Common Vowels: Typically employ sustained phonations of vowels like 'ah' and 'e'.
    • Reason for 'e': Producing an 'e' can slightly raise the larynx and lengthen vocal folds, resulting in higher pitch (approximately 10-15 Hz).
  3. Standardized Reading Passages:
    • Rainbow Passage: The most recognized passage for voice analysis.
      • It has three paragraphs, but frequently only the first is used during assessments.
      • The second sentence is particularly useful, as it mirrors the prosodic pitch variations of conversational speech.
  4. CAPE V Tool:
    • Consists of sentences designed to evaluate specific phonetic components.
    • Details provided in supplementary materials for preparation ahead of practical applications.

Recording Techniques

  • Equipment:
    • Preferably use a dedicated microphone rather than a phone for higher quality audio.
    • Proximity: Microphone should be positioned 10 to 20 centimeters (approximately 4 to 8 inches) from the patient's mouth.
  • Recording Quality: Recordings should exhibit low background noise and high clarity for accurate analysis.

Patient Appearance Assessment

  • General Appearance: Take note of the patient's posture and perceived health.
    • Disposition, energy levels, and overall appearance can provide relevant context for voice assessment.

General Screening

  • Key Areas of Screening:
    • Vocal Characteristics: Nasality, language, cognition, fluency.
    • Hearing Loss: Conduct a screening using an audiometer if concerns arise, as SLPs can perform basic hearing screenings.
  • Breathing Patterns:
    • Identify if the patient primarily breathes diaphragmatically or thoracically, and listen for any abnormal respiratory noises (e.g., stridor).

Vocal Characteristics and Assessments

  • Voice Rating Scales:
    • Historically utilized scales such as the Buffalo scales (less common today).
    • Current preferred methods include KP (a perceptual rating scale) and GRBAS (Grades of Roughness, Breathiness, Asthenia, Stridor).
    • GRBAS Details: Less common now, but it allows for a coarser report on vocal characteristics

Fundamental Frequency Assessment

  • Pitch vs. Fundamental Frequency: Separate definitions but often used interchangeably in practice.
    • Pitch: Perceived frequency; how high or low the voice sounds.
    • Fundamental Frequency: Measured in Hertz (Hz) and refers to the actual frequency of vocal fold vibration.
    • Assess pitch appropriate for age and gender (e.g., children generally have higher pitches than adults).

Vegetative Phonation

  • Defined as vocalizations not meant for speech purposes, such as yawns, coughs, and sneezes.
  • Comparative Analysis: Assess vocal pitch during speech compared to vegetative sounds.

Characteristics of Voice Disorders

  • Intensity and Loudness:
    • Intensity: Measured with instruments.
    • Loudness: Subjectively perceived.
    • Ability to modulate loudness (e.g., speaking quietly or loudly).
  • Qualitative Descriptors:
    • Roughness: A gravelly voice quality.
    • Breathiness: Presence of airflow sound accompanying the voice.
    • Stridor: A squeaky sound indicative of potential obstruction.
    • Hard Glottal Attack: Abrupt onset of voice, as opposed to a more gentle release.

Vocal Pathologies

  • Variability of Vocal Characteristics:
    • Observe consistency or variability in characteristics like pitch during speech versus cough.
  • Common Disordered Behaviors:
    • Pitch Breaks: Sudden changes in pitch during speech production.
    • Aphonation: Complete loss of voice in episodes.
    • Diplophonia: Perception of two pitches simultaneously.
    • Glottal Fry: Characterized by low, creaky sounds.
    • Overt Behaviors: Excessive throat clearing or coughing indicative of issues.
Conclusion
  • All collected data will inform potential diagnoses and guide subsequent therapeutic interventions.
  • Understanding vocal characteristics and behaviors allows for comprehensive patient assessments leading to tailored voice therapy.