| 摘要 |
A first orifice provides a connection between a first liquid chamber and a third liquid chamber that are formed in pairs to cause a volume variation in an opposite direction, and a second orifice provides a connection between a second liquid chamber and a fourth liquid chamber. A first communicating passage communicates between a second liquid chamber side portion of the second orifice and a second liquid chamber neighboring portion of the first orifice. In order of height of an input vibration frequency, a first resonance in the first orifice, a second resonance mainly in the second orifice between an enlarged liquid chamber consisting of the first and second liquid chambers, and the fourth liquid chamber, and a third resonance in a location that the first liquid chamber is connected through the first communicating passage to the second liquid chamber are produced. |
