The usage of Helmholtz resonator is restrained by the space, which is only available for rectangular resonator somewhile.
在实际应用中,共振腔的使用往往受到安装空间的限制,有时候只能安装矩形腔。
英语百科
Helmholtz resonance
(重定向自Helmholtz Resonator)
Helmholtz resonance is the phenomenon of air resonance in a cavity, such as when one blows across the top of an empty bottle. The name comes from a device created in the 1850s by Hermann von Helmholtz, the Helmholtz resonator, which he used to identify the various frequencies or musical pitches present in music and other complex sounds.