Listening Effort, An Overview of App Validation and Testing by the Audiology 4 all Project.

Objective: To describe an application's development and validation process that aims to track hearing difficulties in adverse environments (a listening effort application).

Design: 71 subjects were evaluated, divided into two groups: 30 subjects aged between 18 and 30, and 41 subjects aged between 40 and 65. All subjects had European Portuguese as their native language; the Montreal Cognitive Assessment (MOCA) scored above 24, and all could read and write.