Possibilites and Limitations Offered by the Technique Used in the Investigation

  • The possibilities and limitations of the phonetograms, electroglottograms, electroglottography combined with stroboscopy, fundamental frequency, and register analysis are discussed.

  • Phonetograms are called the audiograms of the voice; the dynamic ranges in decibels are compared with their total frequency range.

  • Electroglottography is an online quantitative measurement curve of vocal fold closure, based on a high-frequency current of low intensity through the larynx (qualitative also in high speed films with kymography).

  • The stroboscopic procedure is supplemented with electroglottography, especially to define the point where the vocal cords close.

  • As the closing point is well defined, electroglottography is a good measure for fundamental frequency changes in children and during puberty at the laryngeal level.

  • Register changes in pubertal boys were measured with electroglottography and acoustical measurements. The results have been documented with high speed films.


Fundamental Frequency Closing Phase Auditive Investigation High Speed Film Closing Point 
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© Springer-Verlag Berlin Heidelberg 2008

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