Filipa M. Lã

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OBJECTIVES Significant changes in body tissues occur during pregnancy; however, literature concerning the effects of pregnancy on the voice is sparse, especially concerning the professional classically trained voice. HYPOTHESES Hormonal variations and associated bodily changes during pregnancy affect phonatory conditions, such as vocal fold motility and(More)
The term "formant tuning" is generally used for the case that one of the lowest formant frequencies coincides with the frequency of a source spectrum partial. Some authors claim that such coincidence is favorable and belongs to the goals of classical opera voice training, whereas other authors have found evidence for advising against it. This investigation(More)
Certain spectrum characteristics have been identified as important for register equalization around the male passaggio, an effect ascribed to formant tuning although descriptions of formant tuning diverge. Eight professional singers sang scales including their passaggio range on different vowels, applying two formant tuning strategies as found in (1)(More)
The success of professional operatic singers depends upon the quality of their vocal mechanism. This is known to be sensitive to changes in the endocrine environment. Despite a widespread belief among singers that vocal quality changes according to the stage of the menstrual cycle, this has received little attention. In particular, the possibility that use(More)
Previous studies have shown that singers tend to sharpen phrase-peak tones as compared with equally tempered tuning (ETT). Here we test the hypothesis that this can serve the purpose of musical expressivity. Data were drawn from earlier recordings, where a professional baritone sang excerpts as void of musical expression as he could (Neutral) and as(More)
during pregnancy significant changes in bodily tissues occur. for example, the cervix undergoes deep structural/biomechanical alterations due to an increase in concentration of progesterone. previous studies have found a significant correlation between the changes that both cervical and vocal fold smears undergo during the menstrual cycle, demonstrating a(More)
AIMS This study aimed at comparing head posture, symmetry of shoulder muscle strength, and posture among developing flutists, professional flutists, and a matched control group of singers. METHODS Measurements of head and scapular posture and muscle strength were compared between flutists with ≤10 yrs of practice (developing flutists, n=9), flutists with(More)
OBJECTIVES The theory of nonlinear source-filter interaction predicts that the glottal voice source should be affected by the frequency relationship between formants and partials. An attempt to experimentally verify this theory is presented. STUDY DESIGN Glottal voice source and electrolaryngograph (ELG) signal differences between vowels were analyzed in(More)
The phonatory and resonatory characteristics of nonclassical styles of singing have been rarely analyzed in voice research. Six professional singers volunteered to sing excerpts from two songs pertaining to the musical theater and to the soul styles of singing. Voice source parameters and formant frequencies were analyzed by inverse filtering tones, sung at(More)
OBJECTIVES Flow ball devices have been used as teaching tools to provide visual real-time feedback of airflow during singing. This study aims at exploring static back pressure and ball height as function of flow for two devices, marketed as flow ball and floating ball game. STUDY DESIGN This is a comparative descriptive study. METHODS A flow-driven(More)