This calculator will calculate a patients hearing handicap using the AAO 1979, AAO 1950, NIOSH-FECA 1972, NIOSH-1997, British Society of Audiology, Wisconsin (CHABA), Oregon, or Ireland equations. In addition, it will estimate the percentage of the handicap from presbycusis utilizing the Robinson Sutton or Spoors equations. It also can project the hearing loss into the future and has an option of apply ISO 1999 compression. Reports are displayed, stored in iBooks or can be emailed.