Journal of the Acoustical Society of Korea最新文献_第7页

A study on user defined spoken wake-up word recognition system using deep neural network-hidden Markov model hybrid model 基于深度神经网络隐马尔可夫模型混合模型的用户定义语音唤醒词识别系统研究

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Journal of the Acoustical Society of Korea Pub Date : 2020-03-01 DOI: 10.7776/ASK.2020.39.2.131

Ki-mu Yoon and Wooil Kim

引用次数: 0

Speaker verification system combining attention-long short term memory based speaker embedding and I-vector in far-field and noisy environments 基于注意-长短时记忆的说话人嵌入与i向量相结合的远场噪声环境下的说话人验证系统

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Journal of the Acoustical Society of Korea Pub Date : 2020-03-01 DOI: 10.7776/ASK.2020.39.2.137

Ara Bae, Wooil Kim

引用次数: 0

A study on the waveform-based end-to-end deep convolutional neural network for weakly supervised sound event detection 基于波形的端到端深度卷积神经网络弱监督声事件检测研究

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Journal of the Acoustical Society of Korea Pub Date : 2020-01-01 DOI: 10.7776/ASK.2020.39.1.024

Seokjin Lee, Minhan Kim, Youngho Jeong

引用次数: 1

Changes in binaural beat strength to the difference of right and left hearing ability 双耳搏动强度随左右听力差异的变化

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Journal of the Acoustical Society of Korea Pub Date : 2020-01-01 DOI: 10.7776/ASK.2020.39.1.057

S. Kim

引用次数: 0

High-intensity focused ultrasound beam path visualization using ultrasound imaging 利用超声成像技术可视化高强度聚焦超声波束路径

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Journal of the Acoustical Society of Korea Pub Date : 2020-01-01 DOI: 10.7776/ASK.2020.39.1.016

J. Song, J. Chang, Y. Yoo

{"title":"High-intensity focused ultrasound beam path visualization using ultrasound imaging","authors":"J. Song, J. Chang, Y. Yoo","doi":"10.7776/ASK.2020.39.1.016","DOIUrl":"https://doi.org/10.7776/ASK.2020.39.1.016","url":null,"abstract":"In High-Intensity Focused Ultrasound (HIFU) treatment, effective localization of HIFU focus is important for developing a safe treatment plan. While Magnetic Resonance Imaging guided HIFU (MRIgHIFU) can visualize the ultrasound path during the treatment for localizing HIFU focus, it is challenging in ultrasound imaging guided HIFU (USIgHIFU). In the present study, a real-time ultrasound beam visualization technique capable of localizing HIFU focus is presented for USIgHIFU. In the proposed method, a short pulse, with the same center frequency of an imaging ultrasound transducer below the regulated acoustic intensity (i.e., Ispta < 720 mW/cm(2)), was transmitted through a HIFU transducer whereupon backscattered signals were received by the imaging transducer. To visualize the HIFU beam path, the backscattered signals underwent dynamic receive focusing and subsequent echo processing. From in vitro experiments with bovine serum albumin gel phantoms, the HIFU beam path was clearly depicted with low acoustic intensity (i.e., Ispta of 94.8 mW/cm(2)) and the HIFU focus was successfully localized before any damages were produced. This result indicates that the proposed ultrasound beam path visualization method can be used for localizing the HIFU focus in real time while minimizing unwanted tissue damage in USIgHIFU treatment.","PeriodicalId":42689,"journal":{"name":"Journal of the Acoustical Society of Korea","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71370536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Comparison of the sound source localization methods appropriate for a compact microphone array 适用于紧凑型麦克风阵列的声源定位方法的比较

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Journal of the Acoustical Society of Korea Pub Date : 2020-01-01 DOI: 10.7776/ASK.2020.39.1.047

In-Jee Jung, J. Ih

{"title":"Comparison of the sound source localization methods appropriate for a compact microphone array","authors":"In-Jee Jung, J. Ih","doi":"10.7776/ASK.2020.39.1.047","DOIUrl":"https://doi.org/10.7776/ASK.2020.39.1.047","url":null,"abstract":": The sound source localization technique has various application fields in the era of internet-of-things, for which the probe size becomes critical. The localization methods using the acoustic intensity vector has an advantage of downsizing the layout of the array owing to a small finite-difference error for the short distance between adjacent microphones. In this paper, the acoustic intensity vector and the Time Difference of Arrival (TDoA) method are compared in the viewpoint of the localization error in the far-field. The comparison is made according to the change of spacing between adjacent microphones of the three-dimensional microphone array arranged in a tetrahedral shape. An additional test is conducted in the reverberant field by varying the reverberation time to verify the effectiveness of the methods applied to the actual environments. For estimating the TDoA, the Generalized Cross Correlation-Phase transform (GCC-PHAT) algorithm is adopted in the computation. It is found that the mean localization error of the acoustic intensimetry is 2.9° and that of the GCC-PHAT is 7.3° for T 60 = 0.4 s, while the error increases as 9.9°, 13.0° for T 60 = 1.0 s, respectively. The data supports that a compact array employing the acoustic intensimetry can localize of the sound source in the actual environment with the moderate reflection conditions.","PeriodicalId":42689,"journal":{"name":"Journal of the Acoustical Society of Korea","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71370552","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Numerical investigation of blade tip vortex cavitation noise using Reynolds-averaged Navier-Stokes simulation and bubble dynamics model 基于reynolds -average Navier-Stokes模拟和气泡动力学模型的叶片尖涡空化噪声数值研究

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Journal of the Acoustical Society of Korea Pub Date : 2020-01-01 DOI: 10.7776/ASK.2020.39.2.077

Ga-ram Ku, C. Cheong, Hanshin Seol

{"title":"Numerical investigation of blade tip vortex cavitation noise using Reynolds-averaged Navier-Stokes simulation and bubble dynamics model","authors":"Ga-ram Ku, C. Cheong, Hanshin Seol","doi":"10.7776/ASK.2020.39.2.077","DOIUrl":"https://doi.org/10.7776/ASK.2020.39.2.077","url":null,"abstract":"In this study, the Eulerian/Lagrangian one-way coupling method is proposed to predict flow noise due to Blade-Tip Vortex Cavitation (BTVC). The proposed method consists of four sequential steps: flow field simulation using Computational Fluid Dynamics (CFD) techniques, reconstruction of wing-tip vortex using vortex model, generation of BTVC using bubble dynamics model and acoustic wave prediction using the acoustic analogy. Because the CFD prediction of tip vortex structure generally suffers from severe under-prediction of its strength along the steamwise direction due to the intrinsic numerical damping of CFD schemes and excessive turbulence intensity, the wing-tip vortex along the freestream direction is regenerated by using the vortex modeling. Then, the bubble dynamics model based on the Rayleigh-Plesset equation was employed to simulate the generation and variation of BTVC. Finally, the flow noise due to BTVC is predicted by modeling each of spherical bubbles as a monople source whose strength is proportional to the rate of time-variation of bubble volume. The validity of the proposed numerical methods is confirmed by comparing the predicted results with the measured data.","PeriodicalId":42689,"journal":{"name":"Journal of the Acoustical Society of Korea","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71370572","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

An effective method to reduce the contraction and expansion noise of air conditioner 一种降低空调缩胀噪声的有效方法

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Journal of the Acoustical Society of Korea Pub Date : 2020-01-01 DOI: 10.7776/ASK.2020.39.2.098

Kangtae Kim, Won-Jin Kim

引用次数: 0

Acoustic insertion loss by a bubble layer for the application to air bubble curtain and air masker 一种用于气泡幕和空气掩蔽器的气泡层的声插入损耗

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Journal of the Acoustical Society of Korea Pub Date : 2020-01-01 DOI: 10.7776/ASK.2020.39.4.227

Cheol-Soo Park, S. Jeong, Gun-Do Kim, I. Moon, G. Yim

引用次数: 2

Design of piezoelectric micro-machined ultrasonic transducer for wideband ultasonic radiation in air 用于空气中宽带超声辐射的压电微机械超声换能器设计

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Journal of the Acoustical Society of Korea Pub Date : 2020-01-01 DOI: 10.7776/ASK.2020.39.2.087

Hongmin Ahn, Jaehyeok Jin, W. Moon

引用次数: 0