Text this: Analogue and digital signal processing circuits for hearing instruments

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