This thesis analyses four different aspects of devotional life at one of England's largest and wealthiest medieval cathedrals between the years 1092 and 1235. Each of these is associated with the remembrance of the dead. It is an area of religious practice that was subject to momentous change over the course of the period. These changes would have a profound effect on the organization of Christian worship for centuries to come. The thesis assesses how contrasting approaches to the practice of remembrance were able to enhance and shape the composition of the church, and explores what they reveal about the distinctive fellowship of a secular cathedral.

The study deals with investigation of acoustical characteristics of a hybrid silencer made up of a dissipative silencer and a quarter wave tube resonator. The theoretical and experimental analyses are performed to define acoustic characteristics of a simple expansion chamber and reactive perforated silencer, while the numerical and experimental solutions are presented for dissipative perforated silencer. Furthermore, the experiments and numerical solutions are extended to the hybrid silencer to find the effect of quarter wave tube resonator on the silencer performance. The experimental results of dissipative silencer are verified with theoretical solutions. The empirical expressions for acoustic impedance of perforation and filling material are presented in this study for use in a three-dimensional boundary element method (BEM). Besides, an experimental setup is also established to find the characteristic impedance and wavenumber of absorbing material to import BEM solution when the empirical expression cannot be used. The results found with BEM are compared by analytical and experimental results favorably.