Purpose Data on vowel formants have been derived primarily from static measures
representing an assumed steady state. This review summarizes data on formant frequencies …

It is widely accepted that information derived from analyzing speech (the acoustic signal)
and language production (words and sentences) serves as a useful window into the health …

Reduced frequency range in vowel production is a well documented speech characteristic of
individuals with psychological and neurological disorders. Affective disorders such as …

Abstract Background/purpose Individuals with Parkinson disease (PD) often exhibit
decreased range of movement secondary to the disease process, which has been shown to …

Purpose: Although articulatory impairment represents distinct speech characteristics in most
neurological diseases affecting movement, methods allowing automated assessments of …

Subtle motor and cognitive changes can manifest prior to diagnosis in many progressive
neurological disorders. Most people with Huntington's disease (HD) develop dysarthria. Yet …

Purpose Literature was reviewed on the development of vowels in children's speech and on
vowel disorders in children and adults, with an emphasis on studies using acoustic methods …

Vowel space (VS) measurements can provide objective information on formant distribution
and act as a proxy for vowel production. There are a number of proposed ways to quantify …

Difficulty producing intelligible speech is a debilitating symptom of Parkinson's disease (PD).
Yet, both the robust evaluation of speech impairments and the identification of the affected …

Reduced frequency range in vowel production is a well documented speech characteristic of
individuals' with psychological and neurological disorders. Depression is known to influence …