The s/z ratio threshold for pathology is:

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Multiple Choice

The s/z ratio threshold for pathology is:

Explanation:
The S/Z ratio is a quick screen for potential laryngeal pathology by comparing how long a sustained voiceless s and a sustained voiced z can be held on one breath. In a healthy voice, these durations are similar, giving a ratio close to 1.0. When there’s a problem with phonation, voicing can be more affected than the fricative, so the duration of z shortens relative to s and the ratio rises. A commonly used cutoff is greater than 1.4, which suggests possible pathology and prompts further evaluation. Remember it’s a screening tool, not a definitive diagnosis, and results can be influenced by fatigue, technique, or other factors.

The S/Z ratio is a quick screen for potential laryngeal pathology by comparing how long a sustained voiceless s and a sustained voiced z can be held on one breath. In a healthy voice, these durations are similar, giving a ratio close to 1.0. When there’s a problem with phonation, voicing can be more affected than the fricative, so the duration of z shortens relative to s and the ratio rises. A commonly used cutoff is greater than 1.4, which suggests possible pathology and prompts further evaluation. Remember it’s a screening tool, not a definitive diagnosis, and results can be influenced by fatigue, technique, or other factors.

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