Text this: Variation of stiffness of two magnetically coupled beams for broadband energy harvesting

 ______      ___      _  _      ___      ______  
|      \\   / _ \\   | \| ||   / _ \\   /_   _// 
|  --  //  | / \ ||  |  ' ||  | / \ ||  `-| |,-  
|  --  \\  | \_/ ||  | .  ||  | \_/ ||    | ||   
|______//   \___//   |_|\_||   \___//     |_||   
`------`    `---`    `-` -`    `---`      `-`'