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This very brief (1 minute) video shows a demonstration of the action of the cricothyroid muscle in elongating and thinning the vocal folds, using an excised cow larynx.
Dr. Titze and other experts explain vocal production by means of analogies to how a car works. This is highly simplified, but graphics are helpful. A highlight is a famous movie scene, in which the voice signal sounds as it would without the filtering of the vocal tract.
Dr. Titze demonstrates exercises that can be done using the straw. He does not give any explanation of the scientific underpinnings of the semi-occluded vocal tract exercises, and only provides a brief explanation for the purposes of the exercises.
This very brief (1 minute) video shows a demonstration of the action of the lateral cricoarytenoids and interaryenoids in adducting the vocal folds and closing the posterior glottic gap, using an excised cow larynx. THere is a biref demonstration of both the posterior cricoarytenoid and the cricothyroid muscles.
