With the advancement in electric propulsion systems, aircraft designers and manufacturers are no longer constrained to established configurations. Developments in Vertical Take-off and Landing (VTOL) aircraft have been seen in recent times through the design of modern tiltrotor aircraft, tiltwing concepts and multi-rotor designs. The combination of these developments allowed engineers to propose designs which utilise the vertical take-off and landing capabilities of a tiltrotor aircraft with electrically driven propulsion systems , deemed eVTOL (Electrically driven Vertical Take-off and Landing). This investigation aims to develop an understanding of the aeroacoustic emissions associated with the non-linear interaction resulting from multi-rotor integrated propellers and a tiltwing eVTOL airframe . Acoustics is one of the key requirements of any future eVTOL aircraft certification , hence, an investigation was conducted into the baseline design, followed by an optimisation study aiming to reduce the amount of noise generated.