Estimation of power consumption of miniature audio directional transducer

The paper describes a method to estimate the power consumption of miniature audio directional transducer using KZK equation according to a larger transducer with the same structure and the same material. A theoretical analysis of sound propagation and sound power for concave-convex cylindrical transducers is presented, which are made by PVDF film of 28 mum with two-sided silver ink of 10 mum at each side. Experimental investigations using 270 times 240 mm² and 50 times 50 mm² transducers are performed. Experiments and theoretical estimation of power consumption of smaller transducer of 50 times 50 mm² used in mobile media devices are presented according to the experimental results of 270 times 240 mm² transducer. And the theoretical results agree with the experimental result and meet the power requirement (< 5W) of mobile media devices.