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I have never concsciously heard any "eefing", but the article makes me thing of interpolated breathing noises, whereas the vocal hiccup seems to be a glottal stop. 2001:16B8:2C55:9A00:A99A:B073:9F81:C7A3 (talk) 14:12, 15 August 2019 (UTC)[reply]

You can use google just like me. I did try hard, to "rescue" the article and fix misconceptions propagated by Jacksonphiles. If you find better descriptions, welcome to update. Staszek Lem (talk) 20:45, 15 August 2019 (UTC)[reply]