"Listen-4" can refer to several things, including the 4ms Listen Four, a four-channel stereo mixer for modular synthesizers; Otto Scharmer's 4 levels of listening, a communication framework; or part 4 of the IELTS Listening test, which is a single, longer lecture or talk. It could also refer to the Listen4Change parent carer forum in the UK or the Listen4Good program, both focused on amplifying the voices of specific communities.