Some of my recent research has thrown up an article from the late eighteenth century on how to build an electric spider, and following a rebirth of an obsession with eighteenth century science, I came across this image from the seventeenth century (allegedly) of hearing tubes.

Following Foucault’s use of Bentham’s panopticon prison as a model for the operation of power, there is a focus on vision as the underpinning of the systems of control and discipline. But as this image asks, what about sound?