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The voice signals a tremendous amount of gender cues. Transfeminine individuals report debilitating quality-of-life deficits as a result of their vocal gender dysphoria. We aimed to quantify the potential impact of this dysphoria experienced with quality-adjusted life years (QALYs), as well as associated treatments, through validated health utility measures.

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The evaluation of how air rarefaction can affect a loudspeaker performance at altitude implies the need for characterization of earphones during hypobaric conditions. The aim of this study was phonometric analysis at different altitudes of the acoustic output of a widely used earphone model, along with its consequences on audiological investigations conducted under such environmental conditions. The transfer function of a TDH-39P earphone was analyzed with an artificial ear under nine different altitude levels, from sea level up to 35,000 ft, inside a hypobaric chamber.

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Purpose: This study was conducted to compare the bone cutting performance of the piezoelectric device with traditional drills in terms of cut execution time, environmental noise produced, surface morphology characteristics, and residual cell vitality of the bone samples.

Materials And Methods: Two fresh pig jaws were obtained from a local slaughterhouse, and nine bone samples with a standard size (1 cm) were harvested from each jaw: three using piezosurgery, three with a multiblade bur mounted on a surgical handpiece, and three with a diamond bur mounted on a high-speed handpiece, for a total of 18 samples. Two samples for each harvesting method were examined by scanning electron microscope (SEM), observing four surfaces per sample.

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[Evaluation of noise risk in roadmen].

G Ital Med Lav Ergon

July 2008

Dipartimento di Medicina Sociale del Territorio, Sezione di Medicina del Lavoro, Università degli Studi di Messina.

The activity of roadman is not much knowed. The evalutation of the risk evidences the noise and vibrations as the principal polluter. The aim of our study is to go into the knowledge of the working risk of that job.

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This study was aimed to evaluate if workers exposed to environmental stressors, including the urban traffic noise, might show significant differences compared to a control group in neuro-psychological and emotional profile as well as neurophysiological functions. In particular if these differences could be evidenced by the application of the "oddball paradigm" for event related potential P300 component. The study consisted of the following examinations: (1) exposed workers vs.

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