{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,26]],"date-time":"2026-09-26T16:30:35Z","timestamp":1790440235120,"version":"4.1.0"},"reference-count":49,"publisher":"American Speech Language Hearing Association","issue":"5","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J Speech Lang Hear Res"],"published-print":{"date-parts":[[1991,10]]},"abstract":"<jats:p>\n            Electroglottographic (EGG) and acoustic records from 10 normal men prolonging the vowel \/a\/ at 60\u201368 dB, 70\u201378 dB, and 80\u201388 dB SPL were obtained. \u201cContact quotient\u201d (EGG duty cycle) was shown to vary directly with vocal SPL. The mean contact quotient was 0.57 (\n            <jats:italic>SD<\/jats:italic>\n            =0.07) and varied on the order of 1% over the course of a given phonation. \u201cContact index,\u201d a metric of EGG symmetry, also tended to vary with SPL. Consistent with previous qualitative descriptions of EGG morphology in modal register voice, the contact ndex averaged \u20130.52 (\n            <jats:italic>SD<\/jats:italic>\n            =0.08), indicating that the EGG \u201cclosing phase\u201d represents about 24% of the entire \u201ccontact phase\u201d Contact index was more variable than contact quotient on consecutive EGG waves, varying by about 10% during phonation. Subjects were also instructed to produce a slow crescendo. Sound pressure and EGG data indicated that both the slope of Increasing EGG contact and EGG duty cycle were significantly related to the amplitude of the acoustic signal These results suggest that quantitative electroglottography may provide powerful insights nto the control and regulation of normal phonation and into the detection and characterization of pathology.\n          <\/jats:p>","DOI":"10.1044\/jshr.3405.1066","type":"journal-article","created":{"date-parts":[[2014,7,29]],"date-time":"2014-07-29T21:22:13Z","timestamp":1406668933000},"page":"1066-1072","source":"Crossref","is-referenced-by-count":103,"title":["Assessment of the Dynamics of Vocal Fold Contact From the Electroglottogram"],"prefix":"10.1044","volume":"34","author":[{"given":"Robert F.","family":"Orlikoff","sequence":"first","affiliation":[{"name":"Memphis State University Memphis, TN"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1310","reference":[{"key":"e_1_3_2_2_1","doi-asserted-by":"crossref","first-page":"281","DOI":"10.3109\/02699208908985291","article-title":"Laryngographic assessment of normal voice: A tutorial","volume":"3","author":"Abberton E. 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