The Radiation Efficiency Measurements of Real System of a Thin Circular Plate Embedded Into a Thick Square Baffle

Most of sound sources are complex vibroacoustic objects consist numerous elements. Some coupled vibrating plates different shapes and sizes can be easily found in urban environments. The main aim this study is to determine the radiation system practical importance. investigated a thin circular plate with thick flat baffle hole. has been mounted baffle’s hole using screws two steel rings. measurement setup was located inside semi-anechoic chamber assure free field conditions. It necessary take into account whole surface obtain efficiency based on Hashimoto’s method. Such an approach troublesome time-consuming. Therefore, criterion proposed which allows vibration velocity measurements calculations performed only for plate’s area. An alternative classical Rayleigh integral formula. Its advantage simpler implementation computer code. obtained results have compared theoretical elastically supported plate. A good agreement at low frequencies.