Acoustic source localization(ASL)and sound event detection(SED)are two widely pursued independent research fields.In recent years,in order to achieve a more complete spatial and temporal representation of sound field,...Acoustic source localization(ASL)and sound event detection(SED)are two widely pursued independent research fields.In recent years,in order to achieve a more complete spatial and temporal representation of sound field,sound event localization and detection(SELD)has become a very active research topic.This paper presents a deep learning-based multioverlapping sound event localization and detection algorithm in three-dimensional space.Log-Mel spectrum and generalized cross-correlation spectrum are joined together in channel dimension as input features.These features are classified and regressed in parallel after training by a neural network to obtain sound recognition and localization results respectively.The channel attention mechanism is also introduced in the network to selectively enhance the features containing essential information and suppress the useless features.Finally,a thourough comparison confirms the efficiency and effectiveness of the proposed SELD algorithm.Field experiments show that the proposed algorithm is robust to reverberation and environment and can achieve higher recognition and localization accuracy compared with the baseline method.展开更多
针对海洋环境中不同温度下声音检测的需求,研发了一种基于光纤布喇格光栅(FBG)的温度补偿型水听器。该水听器利用侧面拉伸式结构进行增敏,通过有限元分析方法对水听器结构进行优化,并在该结构中使用了补偿材料聚甲基丙烯酸甲酯(PMMA),...针对海洋环境中不同温度下声音检测的需求,研发了一种基于光纤布喇格光栅(FBG)的温度补偿型水听器。该水听器利用侧面拉伸式结构进行增敏,通过有限元分析方法对水听器结构进行优化,并在该结构中使用了补偿材料聚甲基丙烯酸甲酯(PMMA),利用其热膨胀效应对FBG进行调制,以降低温度对FBG产生的影响,实现温度补偿。仿真结果表明:该结构在10~2000 Hz范围内可实现较高增敏,同时水听器的灵敏度增益谱显示出共振特征,相比于远离共振频率处,灵敏度增益有进一步的提高,最高达到145 d B;在海洋温度变化范围内(-2℃~30℃)可实现波长偏移小于0.01006 nm的温度补偿。展开更多
基金supported by the National Natural Science Foundation of China(61877067)the Foundation of Science and Technology on Near-Surface Detection Laboratory(TCGZ2019A002,TCGZ2021C003,6142414200511)the Natural Science Basic Research Program of Shaanxi(2021JZ-19)。
文摘Acoustic source localization(ASL)and sound event detection(SED)are two widely pursued independent research fields.In recent years,in order to achieve a more complete spatial and temporal representation of sound field,sound event localization and detection(SELD)has become a very active research topic.This paper presents a deep learning-based multioverlapping sound event localization and detection algorithm in three-dimensional space.Log-Mel spectrum and generalized cross-correlation spectrum are joined together in channel dimension as input features.These features are classified and regressed in parallel after training by a neural network to obtain sound recognition and localization results respectively.The channel attention mechanism is also introduced in the network to selectively enhance the features containing essential information and suppress the useless features.Finally,a thourough comparison confirms the efficiency and effectiveness of the proposed SELD algorithm.Field experiments show that the proposed algorithm is robust to reverberation and environment and can achieve higher recognition and localization accuracy compared with the baseline method.
文摘针对海洋环境中不同温度下声音检测的需求,研发了一种基于光纤布喇格光栅(FBG)的温度补偿型水听器。该水听器利用侧面拉伸式结构进行增敏,通过有限元分析方法对水听器结构进行优化,并在该结构中使用了补偿材料聚甲基丙烯酸甲酯(PMMA),利用其热膨胀效应对FBG进行调制,以降低温度对FBG产生的影响,实现温度补偿。仿真结果表明:该结构在10~2000 Hz范围内可实现较高增敏,同时水听器的灵敏度增益谱显示出共振特征,相比于远离共振频率处,灵敏度增益有进一步的提高,最高达到145 d B;在海洋温度变化范围内(-2℃~30℃)可实现波长偏移小于0.01006 nm的温度补偿。
