摘要
了解电声器件的相位特性对有源消声控制器的设计及消声效果分析具有重要作用。用自制人工头对常用的一种耳罩电声器件的相位特性进行了测试研究,给出了相位及腔内声压级随频率变化的曲线,实验表明被测电声器件的相位在低频变化大,随着频率升高渐趋稳定,耳腔内传声器相对于声源位置变化时,其相位特性基本不变。
It is important to understand the phase characteristics of electro-acoustic device for the design and effect analysis of active noise cancellation controller. Based on self-made artificial head, the test and study on the phase characteristics for a commonly used electro-acoustic device is performed, and the curve of phase to frequency is given at different sound levels. The experiments indicate that the phase characteristics of electro-acoustic device change obviously at low frequency, while it tends to be stable when the frequency goes up gradually. The phase characteristics keep basically constant when the relative position of microphone in ear cavity is changed.
出处
《电声技术》
2005年第3期49-51,60,共4页
Audio Engineering
关键词
电声器件
消声耳罩
相位特性
electro-acoustic device
noise cancellation earmuff
phase characteristics
