Influences of finite-sized non-uniform air-backed baffle on transducer directivity

Sound baffle which improves the sensitivity and the directivity of a transducer is a useful structure for the transducer design.In the paper,models of the finite air-backed baffle and the non-uniform air-backed baffle are presented.Based on ray theory,the influence of the two kinds of air-backed baffles on the directivity of the transducer is studied.Results show that the edge of the baffle and the changes of the baffle's thickness affect the directivity of the transducer.The comparisons between the theoretical and the experimental results are given.