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Acoustic Plane Wave Diffraction from a Circular Soft Ring 圆形软环声平面波衍射
Acta Acustica united with Acustica Pub Date : 2019-07-01 DOI: 10.3813/aaa.919361
Victor Lysechko, D. Kuryliak
{"title":"Acoustic Plane Wave Diffraction from a Circular Soft Ring","authors":"Victor Lysechko, D. Kuryliak","doi":"10.3813/aaa.919361","DOIUrl":"https://doi.org/10.3813/aaa.919361","url":null,"abstract":"The paper presents the implementation of the rigorous method of analytical regularization to the canonical problem of axially-symmetric diff raction from a soft ring. The series equations of the problem are reduced to an infinite series of linear algebraic equations (ISLAE) and the\u0000 technique of analytical regularization is applied. Finally, the resulting matrix equation is the ISLAE of the second kind and can be solved numerically by the truncation method with any desired accuracy. The near field in the vicinity of the aperture of the ring is presented in the form of\u0000 maps of the normalised total field. The far field features of the ring are obtained and discussed. The validation of our calculation is confirmed by testing of the mode matching conditions and through the comparison of the results with those for a disc.","PeriodicalId":35085,"journal":{"name":"Acta Acustica united with Acustica","volume":"56 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75955235","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
Influence of Perforated Ceiling on Floor Impact Sound Insulation in Reinforced Concrete Buildings 穿孔吊顶对钢筋混凝土楼板隔声性能的影响
Acta Acustica united with Acustica Pub Date : 2019-07-01 DOI: 10.3813/AAA.919352
Inho Kim, J. Ryu, Sungchan Lee
{"title":"Influence of Perforated Ceiling on Floor Impact Sound Insulation in Reinforced Concrete Buildings","authors":"Inho Kim, J. Ryu, Sungchan Lee","doi":"10.3813/AAA.919352","DOIUrl":"https://doi.org/10.3813/AAA.919352","url":null,"abstract":"In this study, the influence of a perforated ceiling on the floor impact sound was investigated. The floor impact sound measurements were conducted both with and without suspended ceiling including the perforated and nonperforated panel, using heavy and light weight impact sources in\u0000 a reinforced concrete test building. The results indicated that the perforated ceiling with and without absorption sheet greatly reduced the resonance of floor impact sound by the non-perforated ceiling. However, the perforated ceiling without an absorption sheet did not improve the single\u0000 number quantity (SNQ, rubber ball: L′iA,Fmax,V.T and tapping machine: L′n,w) for the floor impact sound insulation. The perforated ceiling with attached absorption sheet produced SNQs of 2 dB lower and higher than that produced by the non-perforated\u0000 ceiling for heavy and light weight impact sources, respectively. It was also found that the improvement in the floor impact sound insulation after the installation of the perforated ceiling was related to the mass-spring-mass system, rather than the absorption area of the receiving room.","PeriodicalId":35085,"journal":{"name":"Acta Acustica united with Acustica","volume":"2007 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82477622","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: 0
Tunable Band Gap Structures of Acoustic Metamaterials with Magnetorheological Elastomer Cladding Layers 磁流变弹性体包层声学超材料的可调谐带隙结构
Acta Acustica united with Acustica Pub Date : 2019-07-01 DOI: 10.3813/aaa.919360
S. Liu, Yuechao Zhao, Dan Zhao, Lifeng Feng, Xinxin Shi, Lu Chen
{"title":"Tunable Band Gap Structures of Acoustic Metamaterials with Magnetorheological Elastomer Cladding Layers","authors":"S. Liu, Yuechao Zhao, Dan Zhao, Lifeng Feng, Xinxin Shi, Lu Chen","doi":"10.3813/aaa.919360","DOIUrl":"https://doi.org/10.3813/aaa.919360","url":null,"abstract":"One of the challenges associated with acoustic metamaterials is achieving a tunable performance without modifying the structure. In this paper, we propose two types of acoustic metamaterials with a magnetorheological elastomer (MRE), and the tunable band gap structures of the acoustic\u0000 metamaterials are investigated by the finite element method (FEM). The MRE acts as a cladding layer, and its shear modulus can be changed by an applied magnetic field. The band gaps of the two kinds of acoustic metamaterials are calculated for various magnetic fields, and it is found that\u0000 the frequency and width of the band gaps can be adjusted by controlling the applied magnetic field. These results are helpful for the application of acoustic metamaterials in active noise and vibration control.","PeriodicalId":35085,"journal":{"name":"Acta Acustica united with Acustica","volume":"232 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86692729","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: 2
A Unified Correction Method for the Acoustic Refraction (UCMAR) Caused by a Three Dimensional Shear Layer 三维剪切层引起的声波折射统一校正方法
Acta Acustica united with Acustica Pub Date : 2019-07-01 DOI: 10.3813/aaa.919353
Wang Lican, Rong-Yawn Chen, Y. You, Wenjun Wu, Ruofan Qiu
{"title":"A Unified Correction Method for the Acoustic Refraction (UCMAR) Caused by a Three Dimensional Shear Layer","authors":"Wang Lican, Rong-Yawn Chen, Y. You, Wenjun Wu, Ruofan Qiu","doi":"10.3813/aaa.919353","DOIUrl":"https://doi.org/10.3813/aaa.919353","url":null,"abstract":"The acoustic refraction induced by the shear layer in an open-jet wind tunnel causes a source shift when estimating the source location with beamforming. Traditional correction methods of the shear layer refraction are achieved through a computational eff ort or limited using one-dimensional\u0000 or planar shear layer. In this paper, the unified correction method for acoustic refraction (UCMAR) is suitable for the three dimensions that covers several traditional forms. Meanwhile, the UCMAR can consider more general configurations, such as the temperature gradient on both sides of the\u0000 shear layer and the off -axis source in a circular wind tunnel. These configurations are validated through a ray tracing technique and a benchmark example. In addition, the principle of time reverse is integrated with UCMAR. This results in a reverse UCMAR, which can quickly attain an acceptable\u0000 solution.","PeriodicalId":35085,"journal":{"name":"Acta Acustica united with Acustica","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77557870","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: 2
Indirect Methods for Evaluating the In-Situ Performance of Building Base Isolation 建筑基础隔震原位性能评价的间接方法
Acta Acustica united with Acustica Pub Date : 2019-07-01 DOI: 10.3813/AAA.919343
M. Villot, Benjamin Trévisan, L. Grau, P. Jean
{"title":"Indirect Methods for Evaluating the In-Situ Performance of Building Base Isolation","authors":"M. Villot, Benjamin Trévisan, L. Grau, P. Jean","doi":"10.3813/AAA.919343","DOIUrl":"https://doi.org/10.3813/AAA.919343","url":null,"abstract":"Mitigation measures against railway vibration in buildings include elastomeric mounts or springs inserted between building foundations and upper-structures. This paper aims at evaluating on site the field performance of such building base isolation. Two performance indicators are defined\u0000 and used, both expressed as insertion gain: a Power Flow insertion Gain (PFIG) based on the power transmitted to the building upper-structure, and a Building Insertion Gain Indicator (BIGI) based on the building floor velocities. The paper shows that both indicators can be used to evaluate\u0000 the field performance of base-isolated buildings: the PFIG can be indirectly obtained from local measurements of the isolator transmissibility and some knowledge of the mobility magnitudes of the building structures in contact and the BIGI indirectly obtained from measurements of the treated\u0000 building transmissibility (as defined in ISO/TS 14837-31) and some knowledge of the transmissibility of similar but untreated buildings. The methods are successfully validated using a numerical model of a 2D ground-building configuration easy to calculate and assumed realistic enough. The\u0000 paper ends with a discussion on the practicality of obtaining these performances on- site in real buildings.","PeriodicalId":35085,"journal":{"name":"Acta Acustica united with Acustica","volume":"16 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90648526","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
Sound and the City: Current Perspectives on Acoustic Geo-Sensing in Urban Environment 声与城市:城市环境声地球遥感研究现状
Acta Acustica united with Acustica Pub Date : 2019-07-01 DOI: 10.3813/aaa.919357
Florian B. Pokorny, Moritz Fišer, F. Graf, P. Marschik, Björn Schuller
{"title":"Sound and the City: Current Perspectives on Acoustic Geo-Sensing in Urban Environment","authors":"Florian B. Pokorny, Moritz Fišer, F. Graf, P. Marschik, Björn Schuller","doi":"10.3813/aaa.919357","DOIUrl":"https://doi.org/10.3813/aaa.919357","url":null,"abstract":"Acoustic geo-sensing deals with the derivation of spatial information from audio data. Motivated by the rising field of sensing information in (smart) cities, we present current perspectives and a methodological update on the acoustic-based solution of recognition problems in a complex\u0000 urban real-world scenario. In particular, we examine a static and a sequential approach for the automatic recognition of a cyclist's route between fixed endpoints, the route direction, and the route progress, solely based on the audio data recorded with a cell-phone attached to the cyclist.\u0000 To this end, we introduce the freely available 'Graz Cell-phone Cycle Corpus extended' (GC3+) that consists of more than 25 h of GPS-annotated audio material recorded in the southern urban area of the city of Graz, Austria. Promising recognition results confirm\u0000 basic feasibility of acoustic geo-sensing in an urban environment. The approach's theoretical potential of being generalised to support the solution of position tracking problems on a multi-dimensional urban grid gives reason for the implementation of acoustic geo-sensing methodology in a\u0000 number of real-world applications.","PeriodicalId":35085,"journal":{"name":"Acta Acustica united with Acustica","volume":"606 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77089791","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: 5
Influence of the Structure of a Gouge-Filled Fault on the Parameters of Acoustic Emission 充泥断层结构对声发射参数的影响
Acta Acustica united with Acustica Pub Date : 2019-07-01 DOI: 10.3813/aaa.919356
A. Ostapchuk, K. Morozova, D. Pavlov
{"title":"Influence of the Structure of a Gouge-Filled Fault on the Parameters of Acoustic Emission","authors":"A. Ostapchuk, K. Morozova, D. Pavlov","doi":"10.3813/aaa.919356","DOIUrl":"https://doi.org/10.3813/aaa.919356","url":null,"abstract":"Presented are the results of laboratory experiments on investigating manifestations of acoustic emission (AE) of a gouge-filled fault during stick-slip. The laboratory experiments were held at the slider-model setup, when a granite block slides along a rough granite base under normal\u0000 and shear loads. In the course of experiments we altered the structure of the two-component filler of the fault and focused on variations of the AE parameters. The kinematic parameters of fault slip events in all the realizations remained approximately the same. The eff ect of gouge structure\u0000 on the statistics of AE has been revealed. An alteration of proportion of quartz sand / glass beads in the filler of the fault was accompanied by an alteration of the b-value of frequency-energy distribution from 0.53 to 0.85, and the p-value of Omori law from 1.00 to 2.06. Also,\u0000 it has been demonstrated that the nucleation of a slip event is accompanied by an alteration of the mechanism of AE generation – at the initial stage the 'tensile crack' signals prevailed, while at the final stage – the 'shear crack' signals did. The alteration of AE genesis manifested\u0000 vividly in a corresponding alteration of the emitted waveforms for all the realizations.","PeriodicalId":35085,"journal":{"name":"Acta Acustica united with Acustica","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88612762","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: 2
Sound Source System for Investigating the Auditory Perception of Infrasound Accompanied by Audio Sound 研究次声伴声听觉感知的声源系统
Acta Acustica united with Acustica Pub Date : 2019-07-01 DOI: 10.3813/aaa.919366
Elisa Burke, J. Hensel
{"title":"Sound Source System for Investigating the Auditory Perception of Infrasound Accompanied by Audio Sound","authors":"Elisa Burke, J. Hensel","doi":"10.3813/aaa.919366","DOIUrl":"https://doi.org/10.3813/aaa.919366","url":null,"abstract":"To gather more basic knowledge about both infrasound-perception mechanisms and the annoyance caused by infrasound, it is important to investigate the influence of the interaction between infrasound and sound at frequencies inside the common audio frequency range (audio sound) on the\u0000 auditory perception. This paper gives a detailed description of a newly developed sound source system allowing simultaneous monaural stimulation of listeners with infrasound and audio-sound stimuli in psychoacoustic experiments. The sound source system covers a frequency range between 4 Hz\u0000 and 6000 Hz. It can generate infrasound stimuli and audio-sound stimuli up to at least 123 dB SPL and 80 dB SPL, respectively, with inaudible harmonic distortions. Likewise, during simultaneous generation of high-level infrasound and audio sound, residual unwanted modulation frequencies remain\u0000 imperceptible, owing to special design features. It can be concluded that the sound source system is suitable for investigating the auditory perception of infrasound accompanied by audio sound.","PeriodicalId":35085,"journal":{"name":"Acta Acustica united with Acustica","volume":"187 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89136181","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: 2
Source Localization in a Deep Ocean Using the Time Difference of Multipath Arrivals 基于多径到达时差的深海源定位
Acta Acustica united with Acustica Pub Date : 2019-07-01 DOI: 10.3813/aaa.919368
Wenxu Liu, Yixin Yang, Xijing Guo, Yong Wang, Yang Shi
{"title":"Source Localization in a Deep Ocean Using the Time Difference of Multipath Arrivals","authors":"Wenxu Liu, Yixin Yang, Xijing Guo, Yong Wang, Yang Shi","doi":"10.3813/aaa.919368","DOIUrl":"https://doi.org/10.3813/aaa.919368","url":null,"abstract":"Bottom bounce is a typical sound propagation mode in deep oceans. A receiver moored below the sea surface receives sound waves transmitted from a submerged source through multipath paths. Four of them which traveled by bottom bounce mode play the leading role in source localization.\u0000 A passive broadband source localization method is proposed herein based on the four arrival paths and using a single receiver. Through autocorrelation of the signal that is mainly composed of four multipath arrivals, six positive relative time diff erences that are dependent on the source\u0000 range and depth are acquired via combination. The time diff erences are sorted in an ascending order to form a measured vector. A ray-tracing model is used to predict the replica vector. Then, the source is localized by fitting the replica vector to the measured one. An experiment is conducted\u0000 in the South China Sea. The proposed method is utilized to successfully localize a source at a depth of 47 m below the surface and at a distance of 13.6 km.","PeriodicalId":35085,"journal":{"name":"Acta Acustica united with Acustica","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81711852","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: 0
Ultrasound-Based Silent Speech Interface Using Convolutional and Recurrent Neural Networks 基于卷积和循环神经网络的超声波静音语音接口
Acta Acustica united with Acustica Pub Date : 2019-07-01 DOI: 10.3813/AAA.919339
E. Juanpere, T. Csapó
{"title":"Ultrasound-Based Silent Speech Interface Using Convolutional and Recurrent Neural Networks","authors":"E. Juanpere, T. Csapó","doi":"10.3813/AAA.919339","DOIUrl":"https://doi.org/10.3813/AAA.919339","url":null,"abstract":"Silent Speech Interface (SSI) is a technology with the goal of synthesizing speech from articulatory motion. A Deep Neural Network based SSI using ultrasound images of the tongue as input signals and spectral coefficients of a vocoder as target parameters are proposed. Several deep\u0000 learning models, such as a baseline Feed-forward, and a combination of Convolutional and Recurrent Neural Networks are presented and discussed. A pre-processing step using a Deep Convolutional AutoEncoder was also studied. According to the experimental results, an architecture based on a CNN\u0000 and bidirectional LSTM layers has shown the best objective and subjective results.","PeriodicalId":35085,"journal":{"name":"Acta Acustica united with Acustica","volume":"69 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72573545","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: 17
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