发布求助
文献互助 智能选刊 最新文献

Acoustics research letters online : ARLO最新文献

筛选
英文 中文
Wave attenuations in solids with perfectly aligned cracks 具有完全排列的裂纹的固体中的波衰减
Acoustics research letters online : ARLO Pub Date : 2005-02-18 DOI: 10.1121/1.1861092
Liyong Yang, J. Turner
{"title":"Wave attenuations in solids with perfectly aligned cracks","authors":"Liyong Yang, J. Turner","doi":"10.1121/1.1861092","DOIUrl":"https://doi.org/10.1121/1.1861092","url":null,"abstract":"The theory of wave propagation and scattering in cracked media is applied to study the wave attenuations in an isotropic solid medium containing perfectly aligned penny-shaped microcracks. The unit normals of all cracks are assumed parallel to a given direction. The wave scattering model is formulated using an anisotropic Green’s dyadic approach. Explicit expressions are derived for attenuations of the three wave modes in terms of the microcrack density. Numerical results are presented and discussed. In particular, comparisons of the attenuation results presented in this letter with previous results for the Rayleigh limit are given.","PeriodicalId":87384,"journal":{"name":"Acoustics research letters online : ARLO","volume":"13 1","pages":"99-105"},"PeriodicalIF":0.0,"publicationDate":"2005-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86786504","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
Use of acoustic prior information for confidence measure in ASR (automatic speech recognition) applications 声学先验信息在ASR(自动语音识别)应用中的置信度测量
Acoustics research letters online : ARLO Pub Date : 2005-02-02 DOI: 10.1121/1.1843171
Erhan Mengusoglu, C. Ris
{"title":"Use of acoustic prior information for confidence measure in ASR (automatic speech recognition) applications","authors":"Erhan Mengusoglu, C. Ris","doi":"10.1121/1.1843171","DOIUrl":"https://doi.org/10.1121/1.1843171","url":null,"abstract":"In this paper, a new acoustic confidence measure of automatic speech recognition hypothesis is proposed and it is compared to approaches proposed in the literature. This approach takes into account prior information on the acoustic model performance specific to each phoneme. The new method is tested on two types of recognition errors: the out-of-vocabulary words and the errors due to additive noise. An efficient way to interpret the raw confidence measure as a correctness prior probability is also proposed in the paper.","PeriodicalId":87384,"journal":{"name":"Acoustics research letters online : ARLO","volume":"75 1","pages":"92-98"},"PeriodicalIF":0.0,"publicationDate":"2005-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86127759","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
The acoustic heartbeat of Hurricane Juan 飓风胡安的声音心跳
Acoustics research letters online : ARLO Pub Date : 2005-01-28 DOI: 10.1121/1.1850951
D. F. Jones, C. Fogarty
{"title":"The acoustic heartbeat of Hurricane Juan","authors":"D. F. Jones, C. Fogarty","doi":"10.1121/1.1850951","DOIUrl":"https://doi.org/10.1121/1.1850951","url":null,"abstract":"When Hurricane Juan made landfall in Nova Scotia, Canada in September 2003, meteorological and acoustical measurements were made independently. The meteorological data yielded surface wind speeds and directions while wind gust frequencies and noise from damage events were extracted from the acoustical data. By establishing a timeline for damage-related noise using acoustics, greater insight into when and how damage occurred near the audio recording site became possible. Examples of wind-induced damage to local maple and spruce trees are used to illustrate the value of acoustics in high-wind storm events like hurricanes.","PeriodicalId":87384,"journal":{"name":"Acoustics research letters online : ARLO","volume":"124 1","pages":"85-91"},"PeriodicalIF":0.0,"publicationDate":"2005-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72723727","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
Measures of articulatory variability in VCV sequences VCV序列中发音变异性的测量
Acoustics research letters online : ARLO Pub Date : 2005-01-25 DOI: 10.1121/1.1850952
J. Lucero, A. Löfqvist
{"title":"Measures of articulatory variability in VCV sequences","authors":"J. Lucero, A. Löfqvist","doi":"10.1121/1.1850952","DOIUrl":"https://doi.org/10.1121/1.1850952","url":null,"abstract":"Functional data analysis is used to examine articulatory variability across repetitions in normal speech, under different movement constraints. A temporal normalization technique is applied to align trajectories of lips, jaw, and tongue in vowel-consonant-vowel sequences. Next, an index of amplitude variability is computed, defined as the mean standard deviation between peak velocities of the consonantal closure by the active articulator, in each VCV sequence. The results show that articulatory variability varies as a function of both the phonetic requirements of the consonant and the biomechanical characteristics of the articulatory structures involved.","PeriodicalId":87384,"journal":{"name":"Acoustics research letters online : ARLO","volume":"22 1","pages":"80-84"},"PeriodicalIF":0.0,"publicationDate":"2005-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81797137","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: 26
Visualizing acoustic displacements of capacitive micromachined transducers using an interferometric microscope 用干涉显微镜观察电容式微机械换能器的声位移
Acoustics research letters online : ARLO Pub Date : 2005-01-25 DOI: 10.1121/1.1851391
L. Davis, D. Billson, D. Hutchins, R. A. Noble
{"title":"Visualizing acoustic displacements of capacitive micromachined transducers using an interferometric microscope","authors":"L. Davis, D. Billson, D. Hutchins, R. A. Noble","doi":"10.1121/1.1851391","DOIUrl":"https://doi.org/10.1121/1.1851391","url":null,"abstract":"The modification of a commercial Wyko optical profilometer to operate stroboscopically has been demonstrated. This has then been applied to the characterization of a micro-mechanical device subjected to high frequency periodic excitation. It is demonstrated that displacement amplitudes can be mapped across the surface of a micromachined transducer at ultrasonic frequencies.","PeriodicalId":87384,"journal":{"name":"Acoustics research letters online : ARLO","volume":"26 1","pages":"75-79"},"PeriodicalIF":0.0,"publicationDate":"2005-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78263778","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: 18
Two-sensor ultrasonic spacecraft leak detection using structure-borne noise 基于结构噪声的双传感器航天器超声检漏
Acoustics research letters online : ARLO Pub Date : 2005-01-24 DOI: 10.1121/1.1855351
S. Holland, R. Roberts, D. Chimenti, Michael Strei
{"title":"Two-sensor ultrasonic spacecraft leak detection using structure-borne noise","authors":"S. Holland, R. Roberts, D. Chimenti, Michael Strei","doi":"10.1121/1.1855351","DOIUrl":"https://doi.org/10.1121/1.1855351","url":null,"abstract":"Micrometeorite hits can create air leaks in manned spacecraft. Leak-generated-guided ultrasonic waves can be monitored within the platelike spacecraft skin to detect and locate leaks. Cross-correlation techniques allow measurement of the deterministic behavior of the leak-generated noise. Measured leak-into-vacuum cross-correlations of noise signals from two adjacent transducers are recorded as the transducer pair is rotated to determine the relative phase delay as a function of rotation angle. The direction to the leak is found from the variation of phase with angle or from synthetic aperture analysis. The leak is then located through triangulation from two or more sensor-pair locations.","PeriodicalId":87384,"journal":{"name":"Acoustics research letters online : ARLO","volume":"32 1","pages":"63-68"},"PeriodicalIF":0.0,"publicationDate":"2005-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72634017","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: 19
Laboratory measurement of noise generation by shoaling breakers 浅滩破碎机产生噪音的实验室测量
Acoustics research letters online : ARLO Pub Date : 2005-01-24 DOI: 10.1121/1.1839611
S. L. Means, P. Gendron
{"title":"Laboratory measurement of noise generation by shoaling breakers","authors":"S. L. Means, P. Gendron","doi":"10.1121/1.1839611","DOIUrl":"https://doi.org/10.1121/1.1839611","url":null,"abstract":"Simultaneous measurements of the surface gravity wave field and the generated acoustic spectra were made in a sandy beached wave tank. A video camera captured the evolution of the breaking waves. Generated acoustic power levels as a function of the wave crest slope and frequency are presented. An empirical model relating the acoustic energy to the measured wave crest slope for different surface wave frequencies is developed based on a linear regression. It is determined that the wave crest slope is a good predictor of generated acoustic energies. [Work supported by ONR base funding at NRL.]","PeriodicalId":87384,"journal":{"name":"Acoustics research letters online : ARLO","volume":"652 1","pages":"69-74"},"PeriodicalIF":0.0,"publicationDate":"2005-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79240304","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
Direct ultrasonic holography: Feasibility demo 直接超声全息术:可行性演示
Acoustics research letters online : ARLO Pub Date : 2005-01-01 DOI: 10.1121/1.1815252
Changhe Huang, G. Auner, H. Caulfield, J. Rather
{"title":"Direct ultrasonic holography: Feasibility demo","authors":"Changhe Huang, G. Auner, H. Caulfield, J. Rather","doi":"10.1121/1.1815252","DOIUrl":"https://doi.org/10.1121/1.1815252","url":null,"abstract":"Holography is potentially the most powerful method for high spatial resolution real time 3D ultrasound imaging and diagnostics. Although versions of ultrasound holography have existed since the 1970s, they use laser reconstruction, thus losing 3-D resolution. By using transmissive ultrasound with a scanning needle hydrophone, full 3D holographic imaging is proved to be possible, if both amplitude and time delay phase information can be obtained.","PeriodicalId":87384,"journal":{"name":"Acoustics research letters online : ARLO","volume":"103 1","pages":"30-34"},"PeriodicalIF":0.0,"publicationDate":"2005-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90653739","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: 4
Frequency modulation of the sounds produced by the AQUAmark 200® deterrent devices 由AQUAmark 200®威慑装置产生的声音的频率调制
Acoustics research letters online : ARLO Pub Date : 2005-01-01 DOI: 10.1121/1.1815040
L. Rossi, Jean-Louis Rossi
{"title":"Frequency modulation of the sounds produced by the AQUAmark 200® deterrent devices","authors":"L. Rossi, Jean-Louis Rossi","doi":"10.1121/1.1815040","DOIUrl":"https://doi.org/10.1121/1.1815040","url":null,"abstract":"The AQUAmark 200® device is used to reduce the incidental by-catch of small cetaceans in fishing gear. Little information is known about the signal features of this system despite the fact that such knowledge is important to evaluate its efficiency. The AQUAmark 200 device emits eight different signals composed of one fundamental and several others harmonics with energy in the 5-160 kHz band. The mathematical equation of the temporal evolution of the frequency of each signal has been determined by the authors, and the resulting function has been used to build the six nonconstant evolutions.","PeriodicalId":87384,"journal":{"name":"Acoustics research letters online : ARLO","volume":"138 1","pages":"20-24"},"PeriodicalIF":0.0,"publicationDate":"2005-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79738296","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: 3
Reduced-order modeling of vortex-driven excitation of acoustic modes 声模涡驱动激励的降阶建模
Acoustics research letters online : ARLO Pub Date : 2005-01-01 DOI: 10.1121/1.1815253
K. Matveev
{"title":"Reduced-order modeling of vortex-driven excitation of acoustic modes","authors":"K. Matveev","doi":"10.1121/1.1815253","DOIUrl":"https://doi.org/10.1121/1.1815253","url":null,"abstract":"Vortex shedding that occurs in ducts with baffles in the presence of mean flow often leads to excitation of acoustic modes. Resulting flow oscillations may feed back to the process of vortex formation. A simple model is proposed for describing this complex interaction using the hypotheses for a quasi-steadiness of vortex shedding and for a short-period acoustic perturbation at the moment of vortex collision with a downstream baffle. The model is capable of predicting typical real-system phenomena, such as the lock-in of a dominant frequency of the vortex-acoustic instability in some ranges of the mean flow velocity.","PeriodicalId":87384,"journal":{"name":"Acoustics research letters online : ARLO","volume":"22 6S 1","pages":"14-19"},"PeriodicalIF":0.0,"publicationDate":"2005-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76524278","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: 16
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信