Pressure acoustic membranes are new class of components that integrates characteristics of acoustics and pressure dynamics. They are intended to control sound passage, as well as react to pressure fluctuations, making them perfect for a variety of applications in which both acoustics and pressure need to be controlled. These latter membranes are tunable, as they can be designed to tunably move their eigenfrequencies and modal residuals in response to external pressure-field stimulation (as discussed here on tuneable sound transmission through a membrane-type acoustic metamaterial (MAM) ). This enables the sound transmission loss of the structure to be tuned, providing a wide latitude across various acoustic environments.