The Alfred Wolfsohn Voice Research Centre was a project established to investigate the therapeutic and artistic potential of vocal expression. The Centre was founded by Alfred Wolfsohn in Berlin during 1935 and re-situated in London during 1943, where he and his contemporaries and successors developed principles and practices that provided the foundations for the use of an extended vocal technique. This technique allows vocalists to extend their vocal range and flexibility beyond that usually heard in speech or song.