Active noise vibration control apparatus and method for manufacturing same

An active noise vibration control apparatus comprising:

• a housing that has an outer core and is made of a material different from a material of the outer core;
• an inner core that is disposed inside the outer core;
• and
• an electromagnetic coil that is positioned between the outer core and the inner core,
• wherein a space between the outer core and the inner core is filled with a magneto-rheological elastomer containing magnetic particles.

An active noise vibration control apparatus comprising:

• a housing that has an outer core;
• an inner core that is disposed inside the outer core;
• and
• an electromagnetic coil that is positioned between the outer core and the inner core,
• wherein a space between the outer core and the inner core is filled with a magneto-rheological elastomer containing magnetic particles;
• and
• a content rate of the magnetic particles in a magnetic path-forming portion of the magneto-rheological elastomer between the outer core and the inner core is higher than a content rate of the magnetic particles in a portion other than the magnetic path-forming portion of the magneto-rheological elastomer.

A method for manufacturing an active noise vibration control apparatus, comprising:

• an arrangement step of arranging an inner core inside an outer core of a housing having the outer core and arranging an electromagnetic coil between the outer core and the inner core;
• an injection step of injecting a magnetic particle-containing uncured elastomer raw material into a separation space formed, inside the housing, between the outer core and the inner core;
• and
• a magneto-rheological-elastomer formation step of curing the elastomer raw material while forming a given magnetic path in the outer core, the inner core, and the injected elastomer raw material by applying a current to the electromagnetic coil.