Estimation of power consumption of miniature audio directional transducer
Xuesheng Li, Limei Xu, Chenguang Cai, Leon Xu, Antti O. Salo · 2008
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 μm with two-sided silver ink of 10 μm at each side. Experimental investigations using 270×240 mm2and 50 ×50 mm2transducers are performed. Experiments and theoretical estimation of power consumption of smaller transducer of 50 ×50 mm2used in mobile media devices are presented according to the experimental results of 270×240 mm2transducer. And the theoretical results agree with the experimental result and meet the power requirement (≪5W) of mobile media devices.