In this paper, we propose a simplified spatial channel sounding method by utilizing bistatic synthetic aperture radar(BiSAR) principles. Despite the different deployment geometries compared with a conventional BiSAR s...In this paper, we propose a simplified spatial channel sounding method by utilizing bistatic synthetic aperture radar(BiSAR) principles. Despite the different deployment geometries compared with a conventional BiSAR system, the feasibility of the approach is established by 1) the proposed method achieves a better spatial resolution than conventional directional channel sounders and 2) reconstruction algorithms based on time-domain backprojection in conjunction with a digital elevation model provide a good imaging performance and are suitable for reconstructing the spatial distribution of scatterers. Simulations of a high-speed rail(HSR) scenario demonstrate that the estimated power delay profiles(PDPs) and power angle profiles(PAPs) are close to the actual values.展开更多
提出一种基于听觉滤波器模型与声学特征融合的空间感知质量客观评价方法,适用于低混响条件下的双耳Ambisonics重放.首先,使用听觉滤波器模型处理双耳输入信号,提取空间感知相关客观参量,并结合已有的空间感知和音质相关的参量来构建声...提出一种基于听觉滤波器模型与声学特征融合的空间感知质量客观评价方法,适用于低混响条件下的双耳Ambisonics重放.首先,使用听觉滤波器模型处理双耳输入信号,提取空间感知相关客观参量,并结合已有的空间感知和音质相关的参量来构建声学特征集.然后,采用高斯回归过程(Gaussian Process Regression,GPR)模型建立特征集与主观评分的映射关系,以构建客观评价模型.为了验证该方法的有效性,开展主观评价实验,采用无混响/低混响仿真声学场景中的不同双耳Ambisonics重放算法生成的语音信号作为测试激励信号,获得主观评分数据,使用交叉验证的方式训练客观模型并评估模型性能.实验结果显示,与现有的评价模型相比,提出的模型在预测精确度方面取得了显著提升.此外,使用公开的Ambisonics格式(Ambix)音频及其主观评分数据进行外部验证,进一步证明了提出的模型的泛化能力和稳定性.展开更多
针对样本稀缺条件下声学特征提取不充分的问题,提出一种基于通道和空间压缩的小样本声音事件检测方法.该方法通过构建双压缩注意力机制,在通道维度进行特征筛选,在空间维度实现特征聚焦,有效提升了原型网络在小样本场景下的特征判别能力...针对样本稀缺条件下声学特征提取不充分的问题,提出一种基于通道和空间压缩的小样本声音事件检测方法.该方法通过构建双压缩注意力机制,在通道维度进行特征筛选,在空间维度实现特征聚焦,有效提升了原型网络在小样本场景下的特征判别能力.实验结果表明,该方法在数据集DCASE(detection and classification of acoustic scenes and events)上的F1达66.84%,相比原型网络方法提升4.11个百分点,为野生动物监测和生态环境评估等实际应用提供了更可靠的技术支持.展开更多
Based upon the theoretical analysis of the sound field in a finite duct and the spatialsampling principle,this paper applies the adaptive filtering technique to the measurement of thesound field in the duct with the d...Based upon the theoretical analysis of the sound field in a finite duct and the spatialsampling principle,this paper applies the adaptive filtering technique to the measurement of thesound field in the duct with the distribution patterns of standing waves in the direction of thewaveguide and high—order wavefront on the cross section of the duct measured and the acousticmode theory proved by experimental results.展开更多
A hemispherical array of 196 independent loudspeakers has been constructed for laboratory research on spatial hearing, auralization, sound-field quality and spatial audio signal processing. The array of small loudspea...A hemispherical array of 196 independent loudspeakers has been constructed for laboratory research on spatial hearing, auralization, sound-field quality and spatial audio signal processing. The array of small loudspeakers is supported by a geodesic frame with a radius is 2.4 m. With this relatively high spatial density of sound sources, spatially quantized rendering of sound fields should be viable for a variety of applications, and this paper considers the potential and limits of this approach in relation to human spatial hearing capacities. The paper also considers the combined use of multiple loudspeakers for the rendering low-frequency components of sound sources in order to extend the low-frequency response of the system.展开更多
A laboratory study of horizontal spatial effect is conducted to study the change and influence factors of annoyance on horizontal position of the source.Three typical acoustic signals in different azimuth angles can b...A laboratory study of horizontal spatial effect is conducted to study the change and influence factors of annoyance on horizontal position of the source.Three typical acoustic signals in different azimuth angles can be obtained by filtering with the head related transfer function(HRTF).Then,the annoyance scores for each stimulus are marked and horizontal spatial distribution characteristics of annoyance are obtained.At last,correlation and regression analysis are performed based on the binaural acoustic parameters and annoyance results.The results show the consistent variations of the annoyance with azimuth angles of the three kinds of sounds.The range of annoyance caused by the azimuth is about−1−2 points on an 11-point scale.Annoyance is the lowest when the sound source is directly behind,and the highest when it is on the left and right.It is found that the relative binaural loudness or the binaural loudness difference has a significant influence on annoyance of three kinds of sounds,the relative binaural cross-correlation coefficient has a significant influence on wide-band sounds but not on narrowband sounds,and the type of parameters influencing the spatial effect is related to the frequency distribution of the observed signal.The main factors influencing the spatial effect are related to the overall perception of sound and also the differences between the ears.展开更多
基金supported by the National Natural Science Foundation of China under Grant No.6147088the Natural Sciences and Engineering Research Council of Canada-Discovery Grant Program
文摘In this paper, we propose a simplified spatial channel sounding method by utilizing bistatic synthetic aperture radar(BiSAR) principles. Despite the different deployment geometries compared with a conventional BiSAR system, the feasibility of the approach is established by 1) the proposed method achieves a better spatial resolution than conventional directional channel sounders and 2) reconstruction algorithms based on time-domain backprojection in conjunction with a digital elevation model provide a good imaging performance and are suitable for reconstructing the spatial distribution of scatterers. Simulations of a high-speed rail(HSR) scenario demonstrate that the estimated power delay profiles(PDPs) and power angle profiles(PAPs) are close to the actual values.
文摘提出一种基于听觉滤波器模型与声学特征融合的空间感知质量客观评价方法,适用于低混响条件下的双耳Ambisonics重放.首先,使用听觉滤波器模型处理双耳输入信号,提取空间感知相关客观参量,并结合已有的空间感知和音质相关的参量来构建声学特征集.然后,采用高斯回归过程(Gaussian Process Regression,GPR)模型建立特征集与主观评分的映射关系,以构建客观评价模型.为了验证该方法的有效性,开展主观评价实验,采用无混响/低混响仿真声学场景中的不同双耳Ambisonics重放算法生成的语音信号作为测试激励信号,获得主观评分数据,使用交叉验证的方式训练客观模型并评估模型性能.实验结果显示,与现有的评价模型相比,提出的模型在预测精确度方面取得了显著提升.此外,使用公开的Ambisonics格式(Ambix)音频及其主观评分数据进行外部验证,进一步证明了提出的模型的泛化能力和稳定性.
文摘针对样本稀缺条件下声学特征提取不充分的问题,提出一种基于通道和空间压缩的小样本声音事件检测方法.该方法通过构建双压缩注意力机制,在通道维度进行特征筛选,在空间维度实现特征聚焦,有效提升了原型网络在小样本场景下的特征判别能力.实验结果表明,该方法在数据集DCASE(detection and classification of acoustic scenes and events)上的F1达66.84%,相比原型网络方法提升4.11个百分点,为野生动物监测和生态环境评估等实际应用提供了更可靠的技术支持.
文摘Based upon the theoretical analysis of the sound field in a finite duct and the spatialsampling principle,this paper applies the adaptive filtering technique to the measurement of thesound field in the duct with the distribution patterns of standing waves in the direction of thewaveguide and high—order wavefront on the cross section of the duct measured and the acousticmode theory proved by experimental results.
文摘A hemispherical array of 196 independent loudspeakers has been constructed for laboratory research on spatial hearing, auralization, sound-field quality and spatial audio signal processing. The array of small loudspeakers is supported by a geodesic frame with a radius is 2.4 m. With this relatively high spatial density of sound sources, spatially quantized rendering of sound fields should be viable for a variety of applications, and this paper considers the potential and limits of this approach in relation to human spatial hearing capacities. The paper also considers the combined use of multiple loudspeakers for the rendering low-frequency components of sound sources in order to extend the low-frequency response of the system.
基金supported by the National Natural Science Foundation of China(12274350).
文摘A laboratory study of horizontal spatial effect is conducted to study the change and influence factors of annoyance on horizontal position of the source.Three typical acoustic signals in different azimuth angles can be obtained by filtering with the head related transfer function(HRTF).Then,the annoyance scores for each stimulus are marked and horizontal spatial distribution characteristics of annoyance are obtained.At last,correlation and regression analysis are performed based on the binaural acoustic parameters and annoyance results.The results show the consistent variations of the annoyance with azimuth angles of the three kinds of sounds.The range of annoyance caused by the azimuth is about−1−2 points on an 11-point scale.Annoyance is the lowest when the sound source is directly behind,and the highest when it is on the left and right.It is found that the relative binaural loudness or the binaural loudness difference has a significant influence on annoyance of three kinds of sounds,the relative binaural cross-correlation coefficient has a significant influence on wide-band sounds but not on narrowband sounds,and the type of parameters influencing the spatial effect is related to the frequency distribution of the observed signal.The main factors influencing the spatial effect are related to the overall perception of sound and also the differences between the ears.
