Sound Character Calculation and Analysis of Sound Barrier Based on Acoustoelectric Analogy

A new acoustic barrier structure with resonant sound of micro-perforation board absorption structure and impedance composite sound-absorption structure is proposed. The acoustic impedance and the sound-absorption coefficient of the acoustic structure are calculated via means of equivalent circuit. MATLAB is used to calculate the relationship between the parameters of the ontology structure and the sound-absorption coefficient and the sound insulation. It is revealed that the sound barrier of the new ontology structure is 7.65-9.80 dB, which is more than the sound barrier of the traditional reflective structures. The relationships among the parameters of sound-absorption structure, sound-absorption coefficient, and sound insulation performance are obtained. In addition, the parameters can be transformed to satisfy the noise reduction requirements of various road sections, which has a admirable adaptability. The acoustic barrier can have tremendous acoustic performance only if there is a splendid sound insulation in the traffic noise frequency band.