title: Acoustic Emission from Breaking a Bamboo Chopstick.
abstract: The acoustic emission from breaking a bamboo chopstick or a bundle of spaghetti is found to exhibit similar behavior as the famous seismic laws of Gutenberg and Richter, Omori, and Båth. By the use of a force-sensing detector, we establish a positive correlation between the statistics of sound intensity and the magnitude of a tremor. We also manage to derive these laws analytically without invoking the concept of a phase transition, self-organized criticality, or fractal. Our model is deterministic and relies on the existence of a structured cross section, either fibrous or layered. This success at explaining the power-law behavior supports the proposal that geometry is sometimes more important than mechanics.
authors: Department of Physics, National Tsing Hua University, Hsinchu 30013, Taiwan, Republic of China.
authors: Sun-Ting
authors: ST
authors: Tsai
authors: Department of Physics, National Tsing Hua University, Hsinchu 30013, Taiwan, Republic of China.
authors: Li-Min
authors: LM
authors: Wang
authors: Department of Physics, National Tsing Hua University, Hsinchu 30013, Taiwan, Republic of China.
authors: Panpan
authors: P
authors: Huang
authors: Department of Physics, National Tsing Hua University, Hsinchu 30013, Taiwan, Republic of China.
authors: Zhengning
authors: Z
authors: Yang
authors: Department of Physics, National Tsing Hua University, Hsinchu 30013, Taiwan, Republic of China.
authors: Chin-De
authors: CD
authors: Chang
authors: Department of Physics, National Tsing Hua University, Hsinchu 30013, Taiwan, Republic of China.
authors: Tzay-Ming
authors: TM
authors: Hong