声音的反向多普勒效应
Reverse Doppler Effect of Sound
摘要：
本文报道了在双负声学超材料中观察到的反向多普勒效应。超材料表现出负相速度和正群速度。色散关系使得对应于较高频率的波长较长。我们观察到，频率是下移的接近源，和上移时，源后退。
英文摘要：
We report observation of reverse Doppler effect in a double negative acoustic metamaterial. The metamaterial exhibited negative phase velocity and positive group velocity. The dispersion relation is such that the wavelength corresponding to higher frequency is longer. We observed that the frequency was down-shifted for the approaching source, and up-shifted when the source receded.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
