What is the shimmer value considered normal according to typical voice assessment norms?

In voice assessment, shimmer is a measure of amplitude variability that reflects the stability of vocal intensity during phonation. A shimmer value that is considered normal typically indicates that the voice is stable and not exhibiting excessive variations in loudness, which could signal potential vocal issues.

The correct answer indicates that a shimmer value of less than 3.810% falls within the typical range for normal voice assessments. This threshold is used by clinicians to help identify potential problems with vocal control and stability. When shimmer values are above this percentage, it may suggest a higher level of variability in the voice, which can be associated with conditions such as vocal cord nodules, laryngeal pathologies, or other vocal disturbances.

Understanding shimmer values is crucial for speech-language pathologists as it aids in assessing vocal health and diagnosing possible voice disorders. A normal shimmer value supports signs of good vocal fold function and effective vocal technique, making it an important metric during voice evaluations.