Objective measures of phonatory function

This terminology is used widely to refer to machine-made measures of [intlink id=”24″ type=”post”]acoustic[/intlink], [intlink id=”31″ type=”post”]aerodynamic[/intlink], and [intlink id=”151″ type=”post”]electroglottographic[/intlink] output of the voice. At BVI we use quotes around the term objective because, for several basic reasons, these measures are not as objective as they are given credit for. First, the result of such measures may vary markedly with seemingly small changes in voice production, within the same voice. Second, the measures may be entirely non-specific to any particular diagnosis or condition. In other words, one might have the same or highly similar [intlink id=”257″ type=”post”]jitter[/intlink], [intlink id=”497″ type=”post”]shimmer[/intlink], and [intlink id=”31″ type=”post”]aerodynamic[/intlink] measures for any one of several completely different diagnoses, e.g., vocal fold cancer, [intlink id=”641″ type=”post”]vocal fold paralysis[/intlink], [intlink id=”633″ type=”post”]vocal fold bowing[/intlink], [intlink id=”387″ type=”post”]nonorganic voice disorder[/intlink], and so forth.

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