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 _    _     _____    __   __    ______    _  __  
| |  | ||  |  ___||  \ \\/ //  /_   _//  | |/ // 
| |/\| ||  | ||__     \   //    -| ||-   | ' //  
|  /\  ||  | ||__     / . \\    _| ||_   | . \\  
|_// \_||  |_____||  /_//\_\\  /_____//  |_|\_\\ 
`-`   `-`  `-----`   `-`  --`  `-----`   `-` --`

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Text this: Effects of the source on wave propagation in pile integrity testing