動制振器を付加した音さの特性

概要

論文の詳細を見る
The experimental research about the characteristics of the tuning fork with a so-colled Frahm type dynamic damper a ttached to its supported point is reported. The experimental results say that the tuning fork with the dynamic damper can be modelized to a linear system of two-degree-of-freedom. Accordingly, the supported point of the tuning fork becomes a still point independent of the natural frequency f_l of the system which consists of the mass m_l of the tuning fork and of the spring constant k_1 of the support, when the natural frequency f of the tuning fork is equal to the natural frequency f_2 of the dynamic damper. The most significant. characteristics are as follows: (1) Because of no energy loss from the support, the Q-factor of the tuning fork with the dynamic damper becomes very high compared with of the tuning fork without damper. (2) The intensity of sound issued from the box, in which the tuning fork is set, is reduced extremely by the use of the dynamic damper.
1970-06-25