A Helmholtz resonator experiment for the Listen Up project.
A Helmholtz resonator experiment for the Listen Up project.
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Listen Up 项目的亥姆霍兹谐振器实验。
DOI：
10.1121/1.4783101
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发表时间：
2008
影响因子：
2.4
通讯作者：
P. Wilson
中科院分区：
文献类型：
--
作者：
C. Greene;Theodore F. Argo;P. Wilson
Listen Up项目旨在开发一种教育小册子和仪器，用于培养中学生对声学的兴趣，并向他们教授基本的声学概念。包装好的套件必须是低成本的；因此，这个实验使用了一个16盎司的塑料水瓶作为亥姆霍兹谐振器，一个一次性注射器和一个便宜的音高管。了解亥姆霍兹谐振器是声学中许多应用的基础。该装置的简单代数模型来源于机械质量-弹簧类比，将瓶中的空气体积与系统的共振频率联系起来，因此当吹过瓶口时产生的音高。通过带刻度的注射器加水，可以轻松准确地控制瓶内空气的体积。音高对瓶中空气体积的依赖性可以系统地证明，并且可以通过比较音高管产生的声音和音符....来检查模型的有效性
The Listen Up project seeks to develop an educational booklet and apparatus that will be used to foster interest in acoustics and teach basic acoustical concepts to middle school students. The packaged kit must be low cost; hence this experiment uses a 16 oz plastic water bottle as a Helmholtz resonator, a disposable syringe, and an inexpensive pitch pipe. Understanding the Helmholtz resonator is fundamental to many applications in acoustics. A simple algebraic model of the device, derived from a mechanical mass‐spring analogy, relates the volume of air in the bottle to the resonance frequency of the system, and hence the pitch that is produced when one blows over the bottle opening. The volume of air inside the bottle can be easily and accurately controlled by adding water with a graduated syringe. The dependence of pitch on the volume of air in the bottle can be systematically demonstrated, and the validity of the model can be checked by comparing the sound produced to musical notes from the pitch pipe....