Quantitative evaluation of phonetograms in the case of functional dysphonia.

According to the laryngeal clinical findings, figures making up a scale were assigned to vocally trained and vocally untrained persons suffering from different types of functional dysphonia. The different types of dysphonia--from the manifested hypofunctional to the extreme hyperfunctional dysphonia--were classified by means of this scale. Besides, the subjects' phonetograms were measured and approximated by three ellipses, what rendered possible the definition of phonetogram parameters.

Overtone singing: productive mechanisms and acoustic data.

Overtone singing is where one person sings in two voices, the first voice represented by the fundamental and the second by an enhanced harmonic. Overtone singing is performed in chest register. Tuning of the first or second formant and a reduction of the formant bandwidth down to 20 Hz make harmonics prominent.

Influence of unilateral vocal fold fixation on the structure of the intrinsic laryngeal muscles.

Histomorphometric data (fiber frequencies, fiber diameters, and atrophy factors) were determined in laryngeal muscles [thyroarytenoid (VOC), posterior (PCA) and lateral (LCA) cricoarytenoids, and cricothyroid (CT) muscles]. Seventy-three muscles (43,700 fibers) from normal and carcinoma-infiltrated sides of the larynges of 11 patients were analyzed. The fiber diameters showed uniform values of 24.

[What is the value of measuring "singer's formant" in phoniatry?].

The singing formant is the product of an articulatory gesture. Devices for phonetogram measurement often claim the ability to determine it. However, they measure rather the overtone content or the noise of the voice than the formant.

[Assessing the quality of the speaking voice after therapy of T1 and T2 vocal cord cancers].

All studies which analysed voice quality after T1 and T2 glottic cancer employed sustained vowels for evaluation. Sustained vowels can often be produced more clearly than expected in a severe degree of hoarseness in running speech. In this investigation voice quality was analysed by measuring the signal-to-noise-ratio (SNRc) in running speech.