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The Ig Nobel Prizes honor achievements that make people LAUGH, then THINK.

In the Ig Informal Lectures, some days after the ceremony, the new Ig Nobel Prize winners attempt to explain what they did, and why they did it. We released these lectures one at a time.

In Podcast Episode #1087, Marc Abrahams presents the 2021 Ig Nobel Prize for Biology winners Susanne Sch\\xf6tz, Robert Eklund, and Joost van de Weijer. They received the prize for analyzing variations in purring, chirping, chattering, trilling, tweedling, murmuring, meowing, moaning, squeaking, hissing, yowling, howling, growling, and other modes of cat\\u2013human communication.

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• REFERENCE: \\u201cA Comparative Acoustic Analysis of Purring in Four Cats,\\u201d Susanne Sch\\xf6tz and Robert Eklund, Proceedings of Fonetik 2011, Speech, Music and Hearing, KTH, Stockholm, TMH-QPSR, 51.
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• REFERENCE: \\u201cA Phonetic Pilot Study of Vocalisations in Three Cats,\\u201d Susanne Sch\\xf6tz, Proceedings of Fonetik 2012, Department of Philosophy, Linguistics and Theory of Science, University of Gothenburg, Sweden.
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• REFERENCE: \\u201cA Phonetic Pilot Study of Chirp, Chatter, Tweet and Tweedle in Three Domestic Cats,\\u201d Susanne Sch\\xf6tz, Proceedings of Fonetik 2013, Link\\xf6ping University, Sweden, 2013, pp. 65-68.
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• REFERENCE: \\u201cA Study of Human Perception of Intonation in Domestic Cat Meows,\\u201d Susanne Sch\\xf6tz and Joost van de Weijer, Proceedings of the 7th International Conference on Speech Prosody, Dubin, Ireland, May 20-23, 2014.
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• REFERENCE: \\u201cMelody in Human\\u2013Cat Communication (Meowsic): Origins, Past, Present and Future,\\u201d Susanne Sch\\xf6tz, Robert Eklund, and Joost van de Weijer, 2016.
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The video for this lecture\\u2014graphs, charts and all\\u2014can be found online at www.IMPROBABLE.com.

Seth Gliksman, Production Assistant