论文部分内容阅读
研究了一种获取扬声器线阵列高频波导有效辐射率的简单可靠的方法。利用乘积理论和菲涅尔原理,得出在副瓣角度处扬声器线阵列与单节高频波导的垂直指向性相等,且均与其有效辐射率呈sinc函数的简单关系。按照此理论,通过实验测量单节高频波导单元的指向性,得到线阵列的有效辐射率平均值为82.5%,并测量整个线阵列进行验证实验,计算均方误差为0.051。结果表明,该方法可以快速得到阵列的有效辐射率,且准确度高。
A simple and reliable method for obtaining the effective radiance of the high frequency waveguide of a loudspeaker array is studied. Using the product theory and the Fresnel principle, the vertical directivity of the loudspeaker array and the single high frequency waveguide at the sidelobe angle is obtained, and the simple relationship between the linear directivity and the effective emissivity is sinc. According to this theory, the average emissivity of a linear array is 82.5% by experimentally measuring the directivity of a single-section high-frequency waveguide unit. The entire line array is tested to verify that the mean square error is 0.051. The results show that this method can quickly obtain the effective radiation rate of the array with high accuracy.