为庆祝美国建国250周年，宾夕法尼亚州立大学研究人员对自由钟的声学特性进行了建模研究1。这项研究利用自由钟复制品的数据，旨在探索这座著名纪念钟在被敲响时可能发出的声音1。由于自由钟因裂缝已180年未被敲响，该项目为公众提供了一个了解这一历史文物原本音色的科学机会1。
自由钟的沉默源于一段长期的故障历史1。这口钟在1752年首次抵达费城时就因击槌而开裂，曾由John Pass和John Stow重铸过两次1。虽然钟在1817年至1846年之间某个时间获得了其标志性的裂缝，但真正令其永久停用的事件发生于1846年2月23日——当天敲响后，裂缝扩大，使钟"永远沉默"1。研究成果已在2024年美国声学学会会议上展示，并发表在《物理学今日》上1。
Penn State University researchers have conducted an acoustic modeling study of the Liberty Bell to explore what the historic monument may have sounded like when it rang.1 The project was undertaken to mark the 250th anniversary of American independence, utilizing data from a replica of the bell to reconstruct its sonic properties.1
The Liberty Bell has remained silent for 180 years due to a prominent crack that developed in the instrument.1 The bell first cracked when it arrived in Philadelphia in 1752 after being struck by a clapper, and was subsequently recast twice by founders John Pass and John Stow.1 The bell developed its distinctive fissure sometime between 1817 and 1846, and after being rung on February 23, 1846, the crack expanded significantly, rendering the bell permanently mute.1
The research findings were presented at the 2024 American Acoustical Society conference and published in Physics Today.1
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