SOUND REDUCTION OR VIBRATION DAMPING APPARATUS AND STRUCTURAL MEMBER

摘要

Provided is a sound reduction or vibration damping apparatus that has a new sound control principle where the sound control principle is totally different from a known passive or active sound control apparatus. A sound reduction or vibration damping apparatus 1 includes a mass portion 11, spring portions 12a and 12b placed between the mass portion 11 and a structural member 13, and a control unit 4 for causing the spring constants of the spring portions 12a and 12b to continue changing. The sound reduction or vibration damping apparatus 1 is mounted on the structural member 13 to reduce sound passing through the structural member 13 or sound generated from the structural member, or damp the vibration of the structural member 13.

主权项

1. A sound reduction or vibration damping apparatus comprising:
a mass portion; a spring portion placed between the mass portion and a structural member; and a control unit for causing a spring constant of the spring portion to continue changing.