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In page Cristina Deutekom:

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For fast coloratura passages, Deutekom developed a glottal-stop technique, sometimes called glottal staccato. In her own country, a few criticized it as hinting of yodelling, while others dubbed her coloratura technique "cluckatura."[citation needed] Elsewhere, her technique was extra appreciated. In Italy, she was named singer of the year in 1973 and 1974, precisely because of her deliveries of bel canto.