Why do hot and cold water sound different when poured?

Xiaotian Bi, Dike Su, Qianyun Zhou
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Abstract

Empirical studies have demonstrated that humans possess the remarkable capacity to distinguish whether a glass of water is hot or cold solely by the sound of pouring it. However, the underlying physical mechanisms governing the disparities in the acoustic signatures of hot versus cold water remain to be deciphered. In this paper, we conducted a series of experiments to extract the intrinsic features of pouring sounds at contrasting temperatures. The results of our spectral analysis revealed that the sound of pouring hot water exhibited more pronounced low-frequency components and diminished high-frequency components relative to cold water. High-speed photographic evidence elucidated that pouring hot water could generate larger air bubbles in greater abundance. We conjecture that the Minnaert resonance arising from these larger entrained bubbles in hot water produces a lower-frequency acoustic signature, thereby constituting the foundational mechanistic explanation for the auditory distinction between pouring hot and cold water.
为什么倒热水和冷水的声音不同?
实证研究表明,人类拥有非凡的能力,能够仅凭倒水的声音来区分一杯水是热的还是冷的。然而,冷热水声学特征差异的基本物理机制仍有待研究。在本文中,我们进行了一系列实验,以提取不同温度下倒水声音的内在特征。我们的频谱分析结果表明,与冷水相比,倒热水的声音表现出更明显的低频成分和更小的高频成分。我们推测,热水中这些较大的夹带气泡所产生的明纳特共振会产生较低频率的声学特征,从而为听觉区分倒热水和冷水提供了基本的机理解释。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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