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19.0LEGITIMACY SCORE
19.5SAFETY SCORE
12+CONTENT RATING
$2.99PRICE

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Product Details and Description of Ratio S/Z

Ratio S/Z is an app designed by Andreu Sauca, an experienced speech therapist and phoniatrician. It has been conceived as a tool for the evaluation and the monitoring of voice rehabilitation. Purpose: The app registers the maximum expiration and phonation time and the calculation of the phonation quotient (or ratio S/Z) by using the highest of th...