Optimization of Shunted Loudspeaker for Sound Absorption by Fully Exhaustive and Backtracking Algorithm

The shunted loudspeaker with a negative impedance converter is physical system multiple influencing parameters. In this paper, fully exhaustive backtracking algorithm was used to optimize these parameters, such as moving mass, total stiffness, damping, coil inductance, force factor, circuit resistance, inductance and capacitance, in order obtain the best sound absorption specific frequency range. Taking maximum average coefficient range of 100–450 Hz objective function, optimized parameters were analyzed. Simulation results indicated that factor mass can be sufficiently reduced comparison typical four-inch available on market. For given from market an example, four given, measured for verification. good agreement predicted results, demonstrating applicability algorithm.