Mark Bain (1966) is an artist whose work centres on the interaction of acoustics, architecture and physical/mental reactions to infrasonics: sounds below the human hearing threshold. He is involved in ongoing research investigating the effects of inherent and induced sonic events on structures and the people that inhabit them. He uses both the inaudible sounds normally present in buildings and other large constructions. He amplifies them with seismographic and other specially designed equipment, and the sound potential of structures, using machinery to vibrate the materials and/or surroundings for sonic effect.