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Optical method in diagnostic of transient dynamic responses in human skull
Dvořáková, Pavla ; Trnka, Jan ; Veselý, Jan
The paper deals with the study of stress wave propagation in a human skull. Impact was generated both focused ruby laser beam and exploding wires. Transient dynamic responses were studied by means of double pulse holointerferometry and laser interferometry. in the research was paid attention to the evaluation of stress wave propagation velocity and tha result of both optical methods were compared. The study assists in the design of useful medical solutions.
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Shape of the human vocal folds in a defined phonation position
Horáček, Jaromír ; Švec, J. ; Klepáček, I. ; Vetešník, A. ; Veselý, Jan
The paper presents experimental investigation of aerodynamic shape of the vocal folds measured in a defined phonation position with excised larynges. The vocal fold vibrations were excited by airflow and monitored acoustically, by means of laser vibrometry, pressure transducers and stroboscopy techniques. Method for casting laryngeal cavities for determining the vocal fold shape was developed. By the optical topography and the electron scanning microscope the shapes of the vocal folds were analysed.
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