Aerodynamic Analysis Of Voice: Aeroic Analysis

Aerodynamic analysis of voice includes static measures of respiration and dynamic measures of laryngeal valving. The static measures help in understanding the volumes of air that can be inhaled / exhaled in a breath and maximum capacities of an individual’s respiratory system. The dynamic measures provide information about the efficiency of laryngeal valving in converting the expiratory airstream to acoustic energy. Dynamic measures that aid in assessing efficiency of laryngeal valving comprise majorly of the measures of pressure variations at the level of glottis and airflow through the glottis during phonation. In recent years, multiple instruments and protocols have been developed that allow for aerodynamic data to be gathered through relatively

For male voices phonating in modal register and 131 Hz is selected, and for falsetto 262 Hz was set. For female voices 262 Hz is selected for modal register and 523 Hz for the higher register. In this way standardized recordings can be made with the vowel /a/ on fixed pitch and sound pressure level.

Most comfortable phonation: Some subjects are not able to make an efficient phonation at the standardized pitches 131 Hz or 262 Hz at the level 75 dB as is the case in maximum sustained phonation. Therefore, the results obtained will not be representative for the voice. in these cases the most comfortable phonation gives more reliable results.

The subject is asked to take a deep breath and to phonate on the vowel /a/ in his/her most comfortable pitch and loudness level and with a comfortable duration (also called habitual phonation). Therefore, the values which are obtained in the most comfortable phonation may be somewhat different from the values obtained in maximum sustained phonation as the recording situation for many subjects is more natural. Measurements extracted from the recording are: mfr (mean flow rate) in ml/s, phonation time in sec., maximum, minimum, average SPL in dB and phonation

These changes have an effect on a progressive decline in respiratory processing with increasing age after maturation in both men and women. Specific functional losses includes a decline with aging on elastic recoil of lung tissues, reduced vital capacity, increase residual volume and decreased Expiratory/ Inspiratory reserve volume, forced expiratory volume and air flow rate. These changes in respiratory function impact speech breathing in both men and women beginning during middle age, although the pattern and extent of those changes varies by