论文部分内容阅读
双耳脉冲响应(BIRs)是用以表征音乐厅和歌剧院声场特征的参量.由于BIRs是表征声场的转移函数,因此,在消声室中录制的声源信号与BIRs卷积,就代表在实际声场中听到的信号.为了探究原信号的声学特征,一种有效的方法是计算其自相关函数(ACF),因为从ACF中导出的参量能与听者的主观优选良好相关.因此可以说,卷积与相关是室内声学中最重要的计算方法.文中通过将BIRs导出的双耳互相关函数(IACF)和将干信号与BIRs卷积后的IACF作比较,探讨了声源信号与声场之间的关系.在特定条件下,卷积与相关是等同的,此时,干信号与BIRs卷积后的IACC可直接由BIRs导出的IACC与干信号的ACF的有效时间τ_e来表示.
Binaural impulse responses (BIRs) are parameters used to characterize the sound field of concert halls and opera houses.Because BIRs are transfer functions that characterize the sound field, the sound source signal recorded in the anechoic chamber is convolved with the BIRs to represent the actual In order to explore the acoustic characteristics of the original signal, an effective method is to calculate its autocorrelation function (ACF) because the parameters derived from the ACF can correlate well with the subjective preferences of the listener, so it can be said , Convolution and correlation are the most important calculation methods of indoor acoustics.By comparing the binaural cross-correlation function (IACF) derived from BIRs and IACF after convolving the dry signal with BIRs, the relationship between sound source signal and sound field The convolution is equivalent to the correlation under certain conditions, and the IACC after the convolution of the dry signal and the BIRs can be directly expressed by the effective time τ_e of the ACF of the IACC derived from the BIRs and the dry signal.