The core activity of A Capella is the promotion and support of people with hearing impairments, particularly through the development and provision of services and materials in the field of Slow Phonological Coding (LPC). This includes, among other things: consulting and supporting the integration of people with hearing impairments, coding and interpreting LPC, training and courses on LPC, developing projects and materials for children and young people with hearing impairments, communication and public relations to raise awareness of the needs of people with hearing impairments, and scientific observation and research in the field of LPC. The company also offers a fund to support people with hearing impairments, which is financed through donations.