{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,1]],"date-time":"2025-10-01T18:12:45Z","timestamp":1759342365892,"version":"3.38.0"},"reference-count":37,"publisher":"SAGE Publications","issue":"3","license":[{"start":{"date-parts":[[2021,7,12]],"date-time":"2021-07-12T00:00:00Z","timestamp":1626048000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"funder":[{"DOI":"10.13039\/501100006541","name":"Consejer\u00eda de Sanidad, Comunidad de Madrid","doi-asserted-by":"publisher","award":["Atracci\u00f3n de Talento Investigador 2018-T1\/HUM-12"],"award-info":[{"award-number":["Atracci\u00f3n de Talento Investigador 2018-T1\/HUM-12"]}],"id":[{"id":"10.13039\/501100006541","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Psychology of Music"],"published-print":{"date-parts":[[2022,5]]},"abstract":"<jats:p> Glottal adduction is a crucial aspect in voice education and vocal performance: it has major effects on phonatory airflow and, consequently, on voice timbre. As the voice is a non-visible musical instrument, controlling it could be facilitated by providing real-time visual feedback of phonatory airflow. Here, we test the usefulness of a flow ball (FB) training device, visualizing, in terms of the height of a polystyrene ball placed in a plastic basket, phonatory airflow during phonation. Audio and electroglottographic recordings of five postgraduate, classically trained singer students were made under three subsequent conditions: before, during, and after phonating into the FB. The calibrated audio signal was inverse-filtered, using an electroglottograph signal to guide the manual tuning of the inverse filters. Mean phonatory airflow, peak-to-peak pulse amplitude, and normalized amplitude quotient were extracted from the resulting flow glottograms. After the FB condition, increases of mean flow and peak-to-peak pulse amplitude were observed in four singers. In addition, the singers\u2019 mean normalized amplitude quotient increased significantly. The findings, although exploratory, suggest that reduction of glottal adduction can be observed immediately after FB phonation. <\/jats:p>","DOI":"10.1177\/03057356211026735","type":"journal-article","created":{"date-parts":[[2021,7,12]],"date-time":"2021-07-12T12:19:05Z","timestamp":1626092345000},"page":"933-944","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":6,"title":["Augmented visual-feedback of airflow: Immediate effects on voice-source characteristics of students of singing"],"prefix":"10.1177","volume":"50","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-5560-7406","authenticated-orcid":false,"given":"Filipa Martins Batista","family":"L\u00e3","sequence":"first","affiliation":[{"name":"Department of Didactics, School Organization and Special Didactics, Faculty of Education, The National Distance Education University (UNED), Madrid, Spain"}]},{"given":"Johan","family":"Sundberg","sequence":"additional","affiliation":[{"name":"Department of Speech, Music and Hearing, School of Electrical Engineering and Computer Science, KTH Royal Institute of Technology, Stockholm, Sweden"},{"name":"Department of Linguistics, Stockholm University, Stockholm, Sweden"},{"name":"University College of Music Education Stockholm, Stockholm, Sweden"}]},{"given":"Svante","family":"Granqvist","sequence":"additional","affiliation":[{"name":"Division of Speech and Language Pathology, Department of Clinical Science, Intervention and Technology (CLINTEC), Karolinska Institutet, Stockholm, Sweden"},{"name":"Department of Biomedical Engineering and Health Systems, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), KTH Royal Institute of Technology, Stockholm, Sweden"}]}],"member":"179","published-online":{"date-parts":[[2021,7,12]]},"reference":[{"key":"bibr1-03057356211026735","doi-asserted-by":"publisher","DOI":"10.1016\/j.jvoice.2015.02.004"},{"key":"bibr2-03057356211026735","doi-asserted-by":"publisher","DOI":"10.1016\/j.jvoice.2013.11.004"},{"key":"bibr3-03057356211026735","volume-title":"Clinical measurement of speech and voice","author":"Baken R. 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