Reliable and fast methods of measuring sound insulation are vitally important for ensuring the quality of new buildings. However, the current measurement standards do not work well at low frequencies where most complaints occur. This doctoral research project will investigate novel measurement methods adapted for low frequencies that will complement existing standard methods. The research program will involve both theoretical and practical work and will draw on work carried out in numerous student projects. It will exploit the state-of-the-art laboratories at Salford and our 40 plus years of experience as an accredited laboratory for sound insulation measurement.