Sound

摘要： Various time-frequency(T-F)masks are being applied to sound source localization tasks.Moreover,deep learning has dramatically advanced T-F mask estimation.However,existing masks are usually designed for speech separation tasks and are suitable only for single-channel signals.A novel complex-valued T-F mask is proposed that reserves the head-related transfer function(HRTF),customized for binaural sound source localization.In addition,because the convolutional neural network that is exploited to estimate the proposed mask takes binaural spectral information as the input and output,accurate binaural cues can be preserved.Compared with conventional T-F masks that emphasize single speech source–dominated T-F units,HRTFreserved masks eliminate the speech component while keeping the direct propagation path.Thus,the estimated HRTF is capable of extracting more reliable localization features for the final direction of arrival estimation.Hence,binaural sound source localization guided by the proposed T-F mask is robust under noisy and reverberant acoustic environments.The experimental results demonstrate that the new T-F mask is superior to conventional T-F masks and lead to the better performance of sound source localization in adverse environments.

摘要： The sound stimulus has a signifi cant impact on marine animals.However,many studies have focused on the negative impacts of sound on marine vertebrates.The positive impacts of sound on marine animals,especially on marine invertebrates,were rarely studied.In the present study,we evaluated the eff ects of music on the survival and development of an economically important marine invertebrate,swimming crab Portunus trituberculatus.Three pieces of classical music and a control group,i.e.,Eine Kleine Nachtmusik by Mozart(EK),Bach-Violin Concerto No.1(BV),Anonymous Romanza by Anonymous(AR),and environmental sound(EN)were used.The sound pressure received were 163-dB root mean square(RMS)re 1μPa for EK,166-dB RMS re 1μPa for BV,165-dB RMS re 1μPa for AR,44-dB RMS re 1μPa for EN,respectively.The larvae were subject to 3-h classical music transmission every day during the entire larval development period.The result showed that BV and AR signifi cantly elevated the cumulative survival rate of the larva from 3.42%±1.77%(EN)to 10.65%±1.69%(BV)and 7.12%±1.37%(AR)respectively(P<0.05).Though music did not aff ect the cumulative development time of larvae from ZoeaⅠto ZoeaⅣ,it signifi cantly increased the molting rate of megalopa from 24.00%±11.78%(EN)to 44.00%±13.06%(AR)and 46.67%±10.50%(BV)(P<0.05).Musical exposure during critical growth intervals may contribute to the survival and development of larval crustaceans.From an application point of view,music intervention is much economically feasible.The observed music eff ects imply that music could further enhance growth,welfare,and production.

摘要： On April 23,2022,the digital platform "Memory of the World:Chinese Traditional Music Sound Archives"collected and developed by the Chinese National Academy of Arts was officially Gunched online(https://www.ctmsa-cnaa.com)for test run.It was sponsored by the Chinese National Academy of Arts and organized by the Library,the Music Research Institute and the Information Center of the Chinese National Academy of Arts.The launch was held online,with the video speech by Han Ziyong,President of the Chinese National Academy of Arts and the China National Arts and Crafts Museum as well as releva nt experts and scholars,singing high praise of the development and launch of the platform.

摘要： This article proposes a deep neural network(DNN)-based direct-path relative transfer function(DP-RTF)enhancement method for robust direction of arrival(DOA)estimation in noisy and reverberant environments.The DP-RTF refers to the ratio between the directpath acoustic transfer functions of the two microphone channels.First,the complex-value DP-RTF is decomposed into the inter-channel intensity difference,and sinusoidal functions of the inter-channel phase difference in the time-frequency domain.Then,the decomposed DP-RTF features from a series of temporal context frames are utilized to train a DNN model,which maps the DP-RTF features contaminated by noise and reverberation to the clean ones,and meanwhile provides a time-frequency(TF)weight to indicate the reliability of the mapping.The DP-RTF enhancement network can help to enhance the DP-RTF against noise and reverberation.Finally,the DOA of a sound source can be estimated by integrating the weighted matching between the enhanced DP-RTF features and the DP-RTF templates.Experimental results on simulated data show the superiority of the proposed DP-RTF enhancement network for estimating the DOA of the sound source in the environments with various levels of noise and reverberation.

摘要： A lovely pup learned how to tell his owner when he wants to go out and even that he loves them using a dog⁃friendly soundboard.The nearly one⁃year⁃old dog Bunny lives in Tacoma,Washington with his owner Devine.

摘要： The sun came in through the window and the sound of reading came.I woke up and hid behind the black hair,trying not to be discovered.My master was buried in her books,writing hard to prepare for the morning class.Yes,I am a grey hair and my master is a teacher.

摘要： Exposure to sound,heat,and increased physical workload can change physiological parameters.This study was conducted to evaluate the effect of concomitant exposure to sound,heat,and physical workload changes on physiological parameters in controlled laboratory conditions.This experimental crosssectional study was conducted in 35 male university students with a mean age of 25.75 years and a mean BMI of 22.69 kg/m2.Systolic and diastolic blood pressure and heart rate were measured after 15 min rest in the laboratory,5 and 10 min after starting the experiment,and then after 20 min in controlled laboratory conditions in five combination modes.The combination modes were(Sound:65 dB,WBGT:22°C,Speed:1.7,Slope:10%),(Sound:65 dB,WBGT:22°C,Speed:3.4,Slope:14%),(Sound:95 dB,WBGT:22°C,Speed:1.7,Slope:10%),(Sound:65 dB,WBGT:32°C,Speed:1.7,Slope:10%),and(Sound:95 dB,WBGT:32°C,Speed:3.4,Slope:14%).Mixed model analysis and paired t-test were applied for analysis.The results showed that the mean physiological parameters(Systolic and diastolic blood pressure and heart rate)increased when different combination modes worsened(Sound from 65 to 95 dB,WBGT from 22°C to 32°C,speed from 1.7 to 3.4,and slope from 10%to 14%,and when sound:95 dB,WBGT:32°C,Speed:3.4,and Slope:14%).Moreover,the mean changes of systolic and diastolic blood pressure were significant in all conditions when compared with the reference condition(Sound:65 dB,WBGT:22°C,Speed:1.7,and Slope:10%).The mean heart rate changes were also significant except for exposure to the second condition(Sound:65 dB,WBGT:22°C,Speed:3.4,Slope:14%)and the third condition(Sound:95 dB,WBGT:22°C,Speed:1.7,Slope:10%).Exposure to hazardous levels of sound,heat,and workload has adverse effects on physiological parameters.Concomitant exposure to all three hazards has a synergistic effect and increases the adverse effect.

摘要： The structure of the flow and the acoustic signals generated by the impact of a freely falling drop of water with an underlying quiescent fluid have been investigated for droplets having diameter 0.5 cm and a contact velocity in the range 1.5

摘要： Soundscape [2] refers to a landscape which is constructed through sound and hearing as a counterpart of an ordinary visual landscape.The concept of soundscape has attracted much attention and has become a hot topic for research in the academic circle.

摘要： 本发明涉及信噪比估计技术，尤其涉及探测参考信号的信噪比估计方法，包括：求出信道的时域冲击响应；确定噪声估计区间；加窗操作；计算平均信噪比。本发明所述方法能有效减少Sounding信号泄露对噪声估计的影响，进而得到准确的信噪比估计。

摘要： 本发明公开了一种Sounding信道的使用方法和系统，其中，该方法包括：设置数据信息和Sounding序列，其中，上述数据信息包括用户数据和/或导频数据；在发送上述Sounding序列的子载波上发送上述数据信息。本发明解决了现有技术中Sounding序列的发送方法导致的信道传输效率较低的问题，提高了传输效率。

摘要： 一种时分双工TDD通信系统的信号通信方法，包括步骤：在发射端，对信息比特进行编码和调制，将得到的信号与矩阵V相乘，并分配到OFDM子载波上利用允许发射的天线进行发射，其中，利用来自接收端的UL Sounding信号和其余天线的CSI信道反馈信息来得到所述矩阵V；以及在接收端，对接收到的信号进行处理，利用导频信号估计出信道矩阵H，利用得到的矩阵H进行预解码和解调，并输出得到的信息比特。利用本发明，解决了MIMO系统中上下行链路天线配置差异情况下而导致的发射端在一帧内无法获得所有发射天线的信道状态信息的问题，同时提高了系统性能、降低反馈开销并降低接收端的复杂度。

摘要： 本发明实施例公开了一种提升Sounding信号质量的方法，装置和系统，通过为MS在至少两个Sounding符号上分配相同的Sounding发送参数并将所述发送参数信息发送给MS；并接收MS在所述至少两个Sounding符号上发送的Sounding信号，进行Sounding信号增强处理，实现提升Sounding信号质量的目的。本发明实施例同时还提供了提升Sounding信号质量的装置，终端和系统。

摘要： 本发明公开了一种在时分双工(TDD，Time Division Duplex)系统中发送sounding导频的方法及发送装置。包括：在上行子帧中设置固定符号位置，并在所述上行子帧的固定符号位置中发送sounding导频。本发明方法使得在相邻的基站或小区中，用于发送sounding导频的符号位置是相同的，避免了相邻基站或小区间导频与数据的相互干扰，保证了数据的传输质量；而且，由于用于发送sounding导频的符号位置是固定的，基站不必在每次发送sounding导频时，向终端指示用于发送sounding导频的符号位置，减少了基站信令开销，节约了资源。

摘要： 本发明公开了一种在时分双工(TDD，Time Division Duplex)系统中发送sounding导频的方法及发送装置。包括：在上行子帧中设置固定符号位置，并在所述上行子帧的固定符号位置中发送sounding导频。本发明方法使得在相邻的基站或小区中，用于发送sounding导频的符号位置是相同的，避免了相邻基站或小区间导频与数据的相互干扰，保证了数据的传输质量；而且，由于用于发送sounding导频的符号位置是固定的，基站不必在每次发送sounding导频时，向终端指示用于发送sounding导频的符号位置，减少了基站信令开销，节约了资源。