Digits-in-Noise Trial

Large-scale hearing screening and auditory processing programs for school children, adults and the elderly are still restricted. Multiple factors account for this reality, including the cost and training of human resources to perform the procedure, the time required to perform it, and the cost of equipment. Smartphones have recently been used as hearing screening tools because they provide a low cost assessment, important for populations without access to diagnosis. Researchers from South Africa have developed of the digit in noise test (DIN) based on a smartphone app for hearing screening. This test is adaptive – the individual listens to the three-digit series and types them on the phone screen. This project aims at the translation, cross-cultural adaptation, validation and accuracy of DIN in Brazilian Portuguese in all age groups for the identification of hearing impairment and central auditory processing disorders.

Digits-in-Noise Trial


Get to know our project's advantages

Primary Care

Contribute to the identification of hearing impairment and auditory processing disorder at different ages with affordable and affordable mobile technology, which can be applied to Primary Care.

Early intervention

From screening, refer to minimize or avoid consequences of hearing impairment and auditory processing disorder at different ages.

Agility and Efficiency

Contribute to the flow and resolution of the Unified Health System in the care of people with hearing loss and auditory processing disorder.

Evolução do Projeto

Veja os acontecimentos que marcaram o Digits-in-Noise Trial


Digit translation, recording and equalization, psychometric digit analysis and noise generation


DIN study with different types of headphones with normal hearing

Accuracy study of DIN in adolescents, adults and elderly to identify hearing impairment

Accuracy study of DIN in children with central auditory processing disorders


DIN validation based on stimulus type and presentation mode


Accuracy study of DIN in children and adolescents

DIN usability study in Brazilian Portuguese