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S/Z Ratio

The S/Z Ratio is an indicator of voice disorder. It measures the ability to sustain the voiceless sound ‘s’ in comparison to sustaining the voiced sound ‘z’. 95% of people who have some difficulty affecting the movement of their vocal cords have an S/Z ratio of greater than 1.40. This article demonstrates how to calculate an S/Z Ratio and how to interpret the result.

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Stop Throat Clearing!

Clearing the throat can be traumatic to the vocal folds (vocal cords). It’s rather like smacking them together with too much force. Doing this excessively, and over a prolonged period of time (known as chronic throat clearing), can injure the vocal folds and this will in all…

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Symptoms and Causes of Functional Dysphonia

Symptoms of functional dysphonia There are a variety of symptoms associated with functional dysphonia and these differ from person to person. However, those listed below are fairly typical. Of course, you don’t have to experience each one of these to be experiencing a functional voice difficulty.

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Vocal Nodules

Vocal nodules are non-malignant calluses on the vocal cords. They may be large or small, soft or hard. They are caused by trauma to the vocal cords because of vocal misuse and abuse. The voice sounds rough with associated breathiness. Pitch and pitch range is restricted. Voice therapy is the preferred treatment option. However, hard (fibrosed) vocal nodules will first require surgical removal followed by voice therapy to eliminate abusive vocal behaviors that might lead to a recurrence.

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