论文标题
部分填充的Helmholtz谐振器的特征
Characteristics of partially filled Helmholtz resonators
论文作者
论文摘要
在这项工作中，我们开发了一种技术，用于测量Helmholtz共振器的共振曲线，以填充不同尺寸的珠子和沙子，以及水作为参考。我们的测量值使我们能够观察到共振频率和共振的半宽度的截然不同的行为，这是沙粒和珠子大小的函数。通过比较珠子和水的结果，我们能够证明声音渗透到珠子之间的间隙空间。通过测量填充球珠的谐振器中的谐振特性的测量，其实验确定的填充因子接近随机填充因子约为0.54。三种不同尺寸的沙子谐振器的频率和半宽度的相似行为使我们暗示声音以与珠子相同的方式穿透沙子。
In this work we have developed a technique for the measurement of the resonance curve of Helmholtz resonators as a function of filling with beads and sands of different sizes, and water as the reference. Our measurements allowed us to observe very different behaviors of resonance frequencies and resonance half-widths as a function of the size of the sand grains and the beads. By comparing results for beads and water we were able to prove that the sound penetrates the interstitial space between the beads. This was confirmed by measurements of the resonance properties in resonators filled with spherical beads whose experimentally determined filling factor is close to the random filling factor of about 0.54. The similar behavior of the frequency and half-width of resonance of sand-filled resonators of three different sizes allowed us to suggest that sound penetrates the sand in the same way as it does the beads.
