Vibrato!

What exactly is vibrato? Are there different types? How is vibrato produced? This video goes into physiological detail on how "singer jiggles" are made. Some links: Fantastic video, showing alternation between straight and vibrato: http://iopscience.iop.org/article/10.1088/1361-6552/aa6d99/meta Other resources: https://cvtresearch.com/description-and-sound-of-vibrato/ https://asa.scitation.org/doi/10.1121/1.1975886 https://asa.scitation.org/doi/abs/10.1121/1.1434945 https://www.sciencedirect.com/topics/medicine-and-dentistry/vibrato https://pdfs.semanticscholar.org/cb21/e28bbc60026eca2be05fee8799ab06168b53.pdf https://www.slideshare.net/priyanjal/vocal-cord-paralysis http://www.singwise.com/cgi-bin/main.pl?section=articles&doc=Vibrato&page=2 https://vimeo.com/127685535 Spectrograph: http://iopscience.iop.org/article/10.1088/1361-6552/aa6d99 Subglottic Pressure: https://www.ncbi.nlm.nih.gov/pubmedhealth/PMHT0022326/ Goat Bleating: https://www.youtube.com/watch?v=TRposEaZmYo Ethnic Voice Sample: https://www.youtube.com/watch?v=v6Re0R97iek Whitney’s Shaky Jaw: https://www.youtube.com/watch?v=2ASc3Xo-h4I Wobble: https://www.youtube.com/watch?v=3tkNJ5DRvcQ