Annular magnetic body for noise control and member for noise control

An annular magnetic body for noise control comprising thin strips of soft magnetic metal laminated along a radial direction, the annular magnetic body being used by having a cable inserted therethrough, wherein

• the annular magnetic body for noise control comprises a plurality of split pieces divided into a non-annular shape and is used by placing split surfaces of the split pieces in contact with each other to form an annular shape,
• a product FL×Hc of a flatness FL of the split surfaces and a coercivity Hc of the split pieces is 7.0 μm·A/m or less,
• where the flatness FL is a sum of absolute values of a maximum value and a minimum value of a cross-sectional curve measured in accordance with JIS B 0601:2001,
• an arithmetic mean roughness Ra and a maximum height roughness Rz of the split surfaces satisfy Ra≤0.7 μm and Rz≤10 μm, respectively,
• a radial crushing strength is 50 MPa or more,
• the soft-magnetic metal strips include an Fe-based nanocrystalline alloy, and
• a surface pressure on the split surfaces is 0.05 MPa or more.