In this paper, we present an approach to improve the accuracy of environmental sound event detection in a wireless acoustic sensor network for home monitoring. Wireless acoustic sensor nodes can capture sounds in the ...In this paper, we present an approach to improve the accuracy of environmental sound event detection in a wireless acoustic sensor network for home monitoring. Wireless acoustic sensor nodes can capture sounds in the home and simultaneously deliver them to a sink node for sound event detection. The proposed approach is mainly composed of three modules, including signal estimation, reliable sensor channel selection, and sound event detection. During signal estimation, lost packets are recovered to improve the signal quality. Next, reliable channels are selected using a multi-channel cross-correlation coefficient to improve the computational efficiency for distant sound event detection without sacrificing performance. Finally, the signals of the selected two channels are used for environmental sound event detection based on bidirectional gated recurrent neural networks using two-channel audio features. Experiments show that the proposed approach achieves superior performances compared to the baseline.展开更多
目的比较严重意识障碍患者对唤名刺激和铃铛刺激的朝向反应敏感性的差异,为标准化听觉刺激的选择提供参考。方法随机选择50例严重意识障碍(DOC)患者,采用The JFK Coma Recovery Scale-Revise(JFK改进的昏迷恢复量表,以下简称CRS-R)对其...目的比较严重意识障碍患者对唤名刺激和铃铛刺激的朝向反应敏感性的差异,为标准化听觉刺激的选择提供参考。方法随机选择50例严重意识障碍(DOC)患者,采用The JFK Coma Recovery Scale-Revise(JFK改进的昏迷恢复量表,以下简称CRS-R)对其进行床边测量。对于声源定位项,分别记录患者对唤名和铃铛刺激的朝向反应,比较反应的差异性。结果 DOC患者总体(n=50)及VS(n=23)患者对铃铛和唤名的敏感性无显著差异(P>0.05),而其中的MCS/EMCS(Emergency from MCS)(n=27)患者对唤名更敏感(P<0.05)。结论唤名刺激比铃铛等简单刺激可能更适合成为CRS-R量表中声源定位项的标准化刺激。展开更多
The 22.2 multichannel system and its simplified system with 10-channel and 8-channel have been proposed, which brings people 3 D listening experience. But these systems could only accurately reproduce sound field at a...The 22.2 multichannel system and its simplified system with 10-channel and 8-channel have been proposed, which brings people 3 D listening experience. But these systems could only accurately reproduce sound field at a central listening point which is called sweetspot. In order to solve this problem, this paper proposes a non-central zone sound field reproduction method PVMDZ（particle velocity matching between different zones） based on the physical property of sound. The proposed method matches the physical property of sound of non-central zone in reconstructed sound field with that of central zone in original sound field, so the reproduced non-central zone would produce the same listening experience as the central zone of the original system does. By experiments, we compare the performances of the proposed method with the traditional one, and the result proves that the sound field error of proposed method is reduced.展开更多
基金supported by Basic Science Research Program through the National Research Foundation of Korea(NRF) funded by the Ministry of Education (NRF2015R1D1A1A01059804)the MSIP (Ministry of Science,ICT and Future Planning),Korea,under the ITRC(Information Technology Research Center) support program (IITP-2016-R2718-16-0011) supervised by the IITP(Institute for Information & communications Technology Promotion)the present Research has been conducted by the Research Grant of Kwangwoon University in 2017
文摘In this paper, we present an approach to improve the accuracy of environmental sound event detection in a wireless acoustic sensor network for home monitoring. Wireless acoustic sensor nodes can capture sounds in the home and simultaneously deliver them to a sink node for sound event detection. The proposed approach is mainly composed of three modules, including signal estimation, reliable sensor channel selection, and sound event detection. During signal estimation, lost packets are recovered to improve the signal quality. Next, reliable channels are selected using a multi-channel cross-correlation coefficient to improve the computational efficiency for distant sound event detection without sacrificing performance. Finally, the signals of the selected two channels are used for environmental sound event detection based on bidirectional gated recurrent neural networks using two-channel audio features. Experiments show that the proposed approach achieves superior performances compared to the baseline.
文摘目的比较严重意识障碍患者对唤名刺激和铃铛刺激的朝向反应敏感性的差异,为标准化听觉刺激的选择提供参考。方法随机选择50例严重意识障碍(DOC)患者,采用The JFK Coma Recovery Scale-Revise(JFK改进的昏迷恢复量表,以下简称CRS-R)对其进行床边测量。对于声源定位项,分别记录患者对唤名和铃铛刺激的朝向反应,比较反应的差异性。结果 DOC患者总体(n=50)及VS(n=23)患者对铃铛和唤名的敏感性无显著差异(P>0.05),而其中的MCS/EMCS(Emergency from MCS)(n=27)患者对唤名更敏感(P<0.05)。结论唤名刺激比铃铛等简单刺激可能更适合成为CRS-R量表中声源定位项的标准化刺激。
基金Supported by the National Natural Science Foundation of China(61231015,61401319)the Natural Science Foundation of Hubei Province(2015CFA061)
文摘The 22.2 multichannel system and its simplified system with 10-channel and 8-channel have been proposed, which brings people 3 D listening experience. But these systems could only accurately reproduce sound field at a central listening point which is called sweetspot. In order to solve this problem, this paper proposes a non-central zone sound field reproduction method PVMDZ（particle velocity matching between different zones） based on the physical property of sound. The proposed method matches the physical property of sound of non-central zone in reconstructed sound field with that of central zone in original sound field, so the reproduced non-central zone would produce the same listening experience as the central zone of the original system does. By experiments, we compare the performances of the proposed method with the traditional one, and the result proves that the sound field error of proposed method is reduced.
