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The sensitivity functions are then multiplied by scaling coefficients that are determined from the difference between a desired set of formant frequencies and those supported by the current area function. The scaled sensitivity functions are then summed together to generate a perturbation of the area function. This produces a new area function whose associated formant frequencies are closer to the desired values than the previous one. This process is repeated iteratively until the coefficients are equal to zero or are below a threshold value.<\/jats:p>","DOI":"10.1121\/1.2151802","type":"journal-article","created":{"date-parts":[[2006,2,2]],"date-time":"2006-02-02T20:35:39Z","timestamp":1138912539000},"page":"715-718","update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":37,"title":["Technique for \u201ctuning\u201d vocal tract area functions based on acoustic sensitivity functions"],"prefix":"10.1121","volume":"119","author":[{"given":"Brad H.","family":"Story","sequence":"first","affiliation":[{"name":"University of Arizona Speech Acoustics Laboratory, Department of Speech and Hearing Sciences, , Tucson, Arizona 85721"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"231","reference":[{"key":"2023072723530324100_c1","doi-asserted-by":"publisher","first-page":"1535","DOI":"10.1121\/1.381848","article-title":"Inversion of articulatory-to-acoustic transformation in the vocal tract by a computer sorting-sorting technique","volume":"63","year":"1978","journal-title":"J. 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