(NEWSER) – An elderly couple in Sweden was tired of hearing a "whistling sound" coming from their new neighbors' property, so they took revenge by blasting Iron Maiden's "Afraid to Shoot Strangers," police say. The 71-year-old woman and her 81-year-old husband allegedly played the music at top volume until as late as 4am, theLocal reports. Police found one music system on the balcony and another in the basement, both pointed toward the neighbors' home. The husband and wife are now charged with harassment; the wife told police she had to take sleeping pills to deal with the whistling noise. "We wanted to give a taste of their own medicine," her husband explained.