美国医学杂志《呼吸道与急救护理杂志》的研究者是通过比较哼绵羊音与一般平稳吐气时的气流而得到该结论。

In a study in the American Journal of Respiratory and Critical Care Medicine, researchers examined this by comparing airflow in people when they hummed and when they quietly exhaled.

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该研究发表在《糖尿病护理》杂志(美国糖尿病协会的杂志)网络版中。

The study is published in online in Diabetes Care, the journal of the American Diabetes Association.

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