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 ______     _____                ___      _  _   
|      \\  |  ___||     ___     / _ \\   | \| || 
|  --  //  | ||__      /   ||  | / \ ||  |  ' || 
|  --  \\  | ||__     | [] ||  | \_/ ||  | .  || 
|______//  |_____||    \__ ||   \___//   |_|\_|| 
`------`   `-----`      -|_||   `---`    `-` -`  
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Text this: Optical microphone based on Mach Zehnder interferometer