Structure, vibrating device, and sensory acoustic apparatus

A structure comprising:

• a vibration part configured to hold a vibrating member;
• a housing configured to at least partially house the vibration part;
• and
• a supporting part configured to support the vibration part by coupling the vibration part and the housing,
• wherein the supporting part is configured to have a dynamic stiffness that amplifies or attenuates transmission of a vibration of at least a predetermined frequency in a vibration generated in at least one direction by the vibration part in a state of holding the vibrating member, and a static stiffness required for supporting the vibration part in the state of holding the vibrating member,
• wherein a system including the structure and the vibrating member has characteristics in which a vibration transmittance gradually decreases, as a vibration frequency of the vibration in the at least one direction increases, after exhibiting an excited vibration mode in which the vibration transmittance is increased,
• wherein in a case where the dynamic stiffness that amplifies the transmission of the vibration of at least the predetermined frequency is provided, the supporting part further has the dynamic stiffness that exhibits the excited vibration mode such that the vibration transmittance at the predetermined frequency is greater than 1,
• wherein in a case where the dynamic stiffness that attenuates the transmission of the vibration of at least the predetermined frequency is provided, the supporting part further has the dynamic stiffness that exhibits the excited vibration mode such that the vibration transmittance at the predetermined frequency is smaller than 1,
• wherein the supporting part is configured to support the vibration part so as to linearly vibrate back and forth along a first axis, and
• wherein the supporting part includes:
• a first pair including a first supporting body coupled with the vibration part and a second supporting body coupled with the housing;
• a second pair including a first supporting body coupled with the vibration part and a second supporting body coupled with the housing, the second pair being disposed at a position separated from the first pair along a direction of the first axis;
• and
• a coupling part configured to couple the first and second supporting bodies of the first pair and the first and second supporting bodies of the second pair.