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Detecting large particles in a slurry by measuring acoustic cavitation thresholds 通过测量声空化阈值来探测泥浆中的大颗粒
Acoustics research letters online : ARLO Pub Date : 2004-08-05 DOI: 10.1121/1.1779673
S. Madanshetty, Hang Ji
{"title":"Detecting large particles in a slurry by measuring acoustic cavitation thresholds","authors":"S. Madanshetty, Hang Ji","doi":"10.1121/1.1779673","DOIUrl":"https://doi.org/10.1121/1.1779673","url":null,"abstract":"Acoustic microcavitation is used to detect particles in liquids and suspensions. The observation that an acoustic cavitation threshold is characteristic of particle size is exploited to develop a solution for an important problem facing chemical mechanical planarization of silicon wafers. Specifically, it is established via experiments that a sparse presence of large particles in a nanofine slurry can be detected acoustically. Being able to detect such large particles prior to chemical mechanical planarization polishing is expected to save the wafers from being scratched during planarization. The acoustic method is entirely noninvasive.","PeriodicalId":87384,"journal":{"name":"Acoustics research letters online : ARLO","volume":"27 1","pages":"148-152"},"PeriodicalIF":0.0,"publicationDate":"2004-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81246582","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
Investigation into the uniqueness of neonate transient otoacoustic emissions 新生儿瞬态耳声发射独特性的研究
Acoustics research letters online : ARLO Pub Date : 2004-07-09 DOI: 10.1121/1.1771712
Matthew A. Swabey, S. Beeby, A. Brown, J. Chad
{"title":"Investigation into the uniqueness of neonate transient otoacoustic emissions","authors":"Matthew A. Swabey, S. Beeby, A. Brown, J. Chad","doi":"10.1121/1.1771712","DOIUrl":"https://doi.org/10.1121/1.1771712","url":null,"abstract":"This work presents initial findings from an investigation into the use of otoacoustic emissions (OAEs) for identifying individuals.A data set of 2009 neonate transient otoacoustic emissions was quantified for uniqueness using the Euclidean distance separation of the power spectra. Each sample was compared to all the others and the minimum separation recorded. The percentage separation for 50%, 95%, and 99% of the sample set was calculated and the distribution of the minimum separation plotted. The minimum separation between samples was 1.84% while 99% of the samples had a separation of 3.68%.A simple technique was able to achieve a separation of 3.68% for 99% of the data set, indicating it is highly likely that otoacoustic emissions are unique to an individual and of potential use as a biometric variable in an identification system.","PeriodicalId":87384,"journal":{"name":"Acoustics research letters online : ARLO","volume":"18 1","pages":"139-142"},"PeriodicalIF":0.0,"publicationDate":"2004-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81698849","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
Effects of visual gender and frequency shifts on vowel category judgments 视觉性别和频率变化对元音类别判断的影响
Acoustics research letters online : ARLO Pub Date : 2004-06-30 DOI: 10.1121/1.1764472
Catherine M. Glidden, P. Assmann
{"title":"Effects of visual gender and frequency shifts on vowel category judgments","authors":"Catherine M. Glidden, P. Assmann","doi":"10.1121/1.1764472","DOIUrl":"https://doi.org/10.1121/1.1764472","url":null,"abstract":"Visual morphing and a high-quality vocoder were used to study the audio-visual contribution of talker gender to the identification of frequency-shifted vowels. Several acoustic continua from “bit” to “bet” were generated incorporating fundamental frequency (F0) and spectral envelope shifts. Visual continua were constructed from male or female faces, and corresponding steps along the audio/visual continua were synchronized. Boundary shifts emerged for both acoustic cues (F0 and spectral envelope shifts) and visual cues (visual gender) as predicted by the co-variation of these properties in natural speech. Results suggest that perceivers exploit learned relationships between acoustic and visual cues when judging vowel identity.","PeriodicalId":87384,"journal":{"name":"Acoustics research letters online : ARLO","volume":"92 1","pages":"132-138"},"PeriodicalIF":0.0,"publicationDate":"2004-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76385712","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: 14
Formant detail needed for vowel identification 元音识别所需的构象细节
Acoustics research letters online : ARLO Pub Date : 2004-06-25 DOI: 10.1121/1.1764452
A. Neel
{"title":"Formant detail needed for vowel identification","authors":"A. Neel","doi":"10.1121/1.1764452","DOIUrl":"https://doi.org/10.1121/1.1764452","url":null,"abstract":"Changes in formant frequency over time are important for vowel identification: listeners identify stimuli containing time-varying formants better than stimuli with steady-state formants. Statistically based pattern classifiers used as models for human perception have shown that very coarse representations of formant change over time result in accurate classification of American English vowels. In this study, using synthetic stimuli with five levels of formant contour detail, human listeners achieved maximum vowel identification for relatively coarse representations of formant movement containing information about onset, offset, and midpoint frequencies. More detailed representations of contour did not improve identification for most vowels.","PeriodicalId":87384,"journal":{"name":"Acoustics research letters online : ARLO","volume":"56 1","pages":"125-131"},"PeriodicalIF":0.0,"publicationDate":"2004-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75624382","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
Drop parameter estimation from underwater noise produced by raindrop impact 基于雨滴撞击产生的水下噪声的水滴参数估计
Acoustics research letters online : ARLO Pub Date : 2004-06-10 DOI: 10.1121/1.1759731
T. K. Mani, P. Pillai
{"title":"Drop parameter estimation from underwater noise produced by raindrop impact","authors":"T. K. Mani, P. Pillai","doi":"10.1121/1.1759731","DOIUrl":"https://doi.org/10.1121/1.1759731","url":null,"abstract":"A study is presented of the acoustic signals produced by raindrops impacting on the surface of water contained in a sensor assembly. The impact generates low frequency damped pressure waves in water. The low frequency spectrum of this signal is seen to be fairly consistent and is used for measuring the kinetic energy of the raindrops from which the drop-size distribution and the rain intensity are estimated. The proposed method is computationally efficient and can be implemented with simple DSP hardware.","PeriodicalId":87384,"journal":{"name":"Acoustics research letters online : ARLO","volume":"23 1","pages":"118-124"},"PeriodicalIF":0.0,"publicationDate":"2004-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72580857","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
Combination of magnitude and phase statistical features for audio classification 结合幅度和相位统计特征进行音频分类
Acoustics research letters online : ARLO Pub Date : 2004-05-14 DOI: 10.1121/1.1755731
I. Paraskevas, E. Chilton
{"title":"Combination of magnitude and phase statistical features for audio classification","authors":"I. Paraskevas, E. Chilton","doi":"10.1121/1.1755731","DOIUrl":"https://doi.org/10.1121/1.1755731","url":null,"abstract":"The increasing demand for the retrieval and classification of audio utterances from multimedia databases, gives rise to the need for the implementation of effective feature extraction techniques. Most recent techniques employ temporal-related features and magnitude spectral features. In the proposed method, we use both the magnitude and phase spectrum of the signals to derive the features. By overcoming the discontinuity problems of phase, phase may be used as an additional feature stream. The experimental results derived from ten classes of gunshots show that, for certain classes, there is an improvement of 14% when both magnitude and phase information is employed, compared to the case when only the magnitude feature vector is used. Also, the results reported here show that the reliability of the method is increased, demonstrating the complementary nature of magnitude and phase.","PeriodicalId":87384,"journal":{"name":"Acoustics research letters online : ARLO","volume":"21 1","pages":"111-117"},"PeriodicalIF":0.0,"publicationDate":"2004-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88159311","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: 24
Determining equivalent circuit parameters for low figure of merit transducers 确定低功值传感器的等效电路参数
Acoustics research letters online : ARLO Pub Date : 2004-04-19 DOI: 10.1121/1.1756031
W. Marshall, G. Brigham
{"title":"Determining equivalent circuit parameters for low figure of merit transducers","authors":"W. Marshall, G. Brigham","doi":"10.1121/1.1756031","DOIUrl":"https://doi.org/10.1121/1.1756031","url":null,"abstract":"A new analytical technique for deriving transducer equivalent circuit parameters from complex electrical admittance data is presented. The new method handles low figure of merit transducers (those having weak coupling and/or low Qm), but does not require phasor subtraction or similar geometrical manipulations of the admittance loop. Four parameters of the unloaded, single degree-of-freedom equivalent circuit are extracted from a simple analysis of the capacitance curve, B(ω)/ω, and one additional parameter is obtained from the dissipation curve, G(ω)/B(ω). This technique simplifies the evaluation of developmental transducers, particularly those using marginal or weakly polarized materials.","PeriodicalId":87384,"journal":{"name":"Acoustics research letters online : ARLO","volume":"17 5 1","pages":"106-110"},"PeriodicalIF":0.0,"publicationDate":"2004-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78404679","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
Speech perception in noise with a two-sensor frequency-domain minimum-variance (FMV) beamforming algorithm 基于双传感器频域最小方差(FMV)波束形成算法的噪声语音感知
Acoustics research letters online : ARLO Pub Date : 2004-04-02 DOI: 10.1121/1.1740797
Jeffery B. Larsen, C. Lansing, R. Bilger, B. Wheeler, Sandeep A Phatak, M. Lockwood, W. O’Brien, A. Feng
{"title":"Speech perception in noise with a two-sensor frequency-domain minimum-variance (FMV) beamforming algorithm","authors":"Jeffery B. Larsen, C. Lansing, R. Bilger, B. Wheeler, Sandeep A Phatak, M. Lockwood, W. O’Brien, A. Feng","doi":"10.1121/1.1740797","DOIUrl":"https://doi.org/10.1121/1.1740797","url":null,"abstract":"The performance of a two-sensor based, frequency-domain minimum-variance beamforming algorithm (FMV) to extract a signal in the presence of multiple interferers was evaluated. Speech reception thresholds (SRT) and speech intelligibility measures were obtained from listeners with normal hearing or with mild-to-moderate sensorineural hearing loss. Word and sentence length stimuli were processed through the FMV algorithm, directional microphones alone, or with a simple delay-and-sum beamformer. Listener’s ratings of speech intelligibility, percent of words repeated correctly, and threshold for words and sentences in the presence of four competing signals showed the FMV to provide significant performance benefits across different listening environments.","PeriodicalId":87384,"journal":{"name":"Acoustics research letters online : ARLO","volume":"536 1","pages":"100-105"},"PeriodicalIF":0.0,"publicationDate":"2004-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77906311","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 frequency-modulated glides with virtual frequency glides in direction identification 调频滑翔机与虚频滑翔机方向识别的比较
Acoustics research letters online : ARLO Pub Date : 2004-03-19 DOI: 10.1121/1.1689691
R. M. Dawson, L. Feth
{"title":"Comparison of frequency-modulated glides with virtual frequency glides in direction identification","authors":"R. M. Dawson, L. Feth","doi":"10.1121/1.1689691","DOIUrl":"https://doi.org/10.1121/1.1689691","url":null,"abstract":"Four listeners were asked to identify the direction of frequency change, up versus down, for frequency-modulated (FM) and virtual-frequency (VF) glides. VF glides are generated by co-modulating a pair of fixed-frequency tones so that the spectral center-of-gravity moves. Performance in direction identification (D-ID) decreased as glide duration decreased for both types of glides. Further, performance was better when the glide increased in frequency than when it decreased. Finally, the VF D-ID task was more difficult than the FM task, but the patterns of performance were similar. These results suggest similar processing mechanisms for the two types of glides.","PeriodicalId":87384,"journal":{"name":"Acoustics research letters online : ARLO","volume":"2 1","pages":"95-99"},"PeriodicalIF":0.0,"publicationDate":"2004-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88998135","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 role of radiation damping in violin sound 辐射阻尼在小提琴声音中的作用
Acoustics research letters online : ARLO Pub Date : 2004-03-16 DOI: 10.1121/1.1675811
G. Bissinger
{"title":"The role of radiation damping in violin sound","authors":"G. Bissinger","doi":"10.1121/1.1675811","DOIUrl":"https://doi.org/10.1121/1.1675811","url":null,"abstract":"A generalized model combining experimental normal mode radiation efficiency and total damping trendlines and structural acoustics systematics was developed to examine violin quality-related trends in radiation damping ζrad and fraction-of-vibrational-energy-radiated FRAD up to 8 kHz. FRAD was similar for “good” and “bad” violins. ζrad and FRAD exhibit a “knee” at the critical frequency, where FRAD reached its maximum value of ∼0.5. The critical frequency falls significantly lower for “good” than “bad” violins (3-violin samples for each), which imparts a relative enhancement to acoustic output near 3 kHz for “good” violins, independent of any bridge contribution or excitation method.","PeriodicalId":87384,"journal":{"name":"Acoustics research letters online : ARLO","volume":"94 1","pages":"82-87"},"PeriodicalIF":0.0,"publicationDate":"2004-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74890404","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: 12
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