A Study of Brain Mechanisms by Which Sound Source Location and Amount of Masking Affect Target Perception

In the cocktail-party listening environments, listeners can selectively focus their attention on the positions of the target speaker according to their communicative intentions, suppress the influence of other speech, and effectively process the semantic information of the target speech. However, it is not clear how factors such as the positional relationship and the number of interfering speech affect the target speech perception enhancement mechanism and the interfering speech suppression mechanism. Therefore, this paper focuses on how the positions and number of speech affect the the neural mechanism of brain perception of target speech. In this paper, we try to change the positions of speech, the spatial position relationships between speech sources and the number of masked speech to explain the brain mechanisms when listeners process the target in different communicative environments. The experimental results show that the spatial position of the speech sources and the number of mask speech interactively affect the allocation of attentional resources when listeners perceive and process the target speech and creatively suggest that the location of the target speech also affects the efficiency of the brain in processing the target speech, which further indicates the neural mechanisms of attentional allocation and semantic processing in a real communicative environment. The paper argues that spatial position separation is also affected by the intelligibility of semantic information in interfering speech when facilitating target sound perception.