Participants Six young female adults participated in the experiment, each was either a junior or senior attending Florida State University. Majority of the subjects exhibited normal phonation and revealed they had no damage or irritated vocal folds. However, subject four had a lympnode infection and accompanied swelling that may have interfered with her ability to phonate at various pitches.
Equipment
The equipment used during the experiment entailed a Glottal Enterprises MC2-1 electroglottograph (EGG) and a KayPENTAX CSL 4500 hardware-software system. The electroglottograph generates very low noise EGG waveforms and was joined to a desktop computer. The electroglottograph enabled recognition of proper electrode placement and comprised…show more content… The modal involved a normal pitch, whereas the falsetto was exceedingly high pitched and somewhat screeching. Conversely, the pulse encompassed a lower pitch and sounded creaky. The lab assistant then positioned the dual-channel electrodes at two nearby locations on the neck, this measured the translaryngeal electrical resistance. The signals were then combined at the main EGG output, but were recorded individually on paper. The LED array on the anterior panel of the Glottal Enterprises MC2-1 electroglottograph aided electrode placement and helped track laryngeal movement. Participants were told to sustain the vowel until a representation of the EGG waveform appeared on the computer screen. After each subject sustained the vowel, for each vocal register the lab assistants calculated the three cycles of the period of vocal fold vibration. They also measured the closed phase of the vocal fold pulsation. As this information was revealed, one of the subjects transcribed the results on paper that displayed the modal period, the modal closed phase, falsetto, the falsetto closed period and the pulse period. Upon completion of the experiment, the subjects had to compute the fundamental frequency in Hertz and calculate the closing quotient percentage of the
