 This study aims to investigate whether the use of a user-operated audiometry, UAUD, system can provide comparable hearing aid effectiveness to traditional audiometry, while also assessing the correlation between the user-operated ACT test of spectrotemporal modulation sensitivity and measures of speech intelligibility. This study will involve 250 adults who are referred for hearing aid treatment and will be randomly assigned to either traditional audiometry or UAUD. The primary outcome will be a comparison of the change in speech, spatial and qualities of hearing scale, SSQ12, scores from baseline to follow up between the two groups. Additionally, the user-operated ACT test of spectrotemporal modulation sensitivity will be compared with measures of speech intelligibility from the traditional audiometry session and follow-up measurements. This article was authored by Jesper Vass-Schmidt, Ellen Rabin Pedersen, Carl Christian Pedersen and others.