Preparation and Analysis of a Thin Composite Membrane for Electroacoustic Applications

In this paper, elastic soft composite silicone has been used to produce membrane for an electroacoustic device. 80 μm iron powder in a silicone matrix was used in the spin coating process. Membranes have been created with different thicknesses and different iron contents. The properties of the composite microstructure were investigated using a scanning electron microscope. A measurement system for the acoustic power of the system was built. A large influence of membrane thickness on the acoustic response has been demonstrated. The influence of production parameters on the distribution of iron grains was shown and related to the acoustic response. The collections between the membrane structure are shown. The presented electroacoustic device can be used as a low-power loudspeaker.