Text this: Realization of an acoustic third-order topological insulator

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  / ___// | || | ||     ___    /_   _//  /_   _// 
  \___ \\ | || | ||    /   ||   -| ||-   `-| |,-  
  /    // | \\_/ ||   | [] ||   _| ||_     | ||   
 /____//   \____//     \__ ||  /_____//    |_||   
`-----`     `---`       -|_||  `-----`     `-`'   
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