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  • Comparative Studies. Non-European Languages/Literatures  (86)
  • 1
    Online Resource
    Online Resource
    Vowel and tone identification of Mandarin Chinese: Comparison between native Chinese and Korean listeners
    Acoustical Society of America (ASA) ; 2016
    In:  Journal of the Acoustical Society of America Vol. 140, No. 4_Supplement ( 2016-10-01), p. 3337-3337
    Details
    In: Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 140, No. 4_Supplement ( 2016-10-01), p. 3337-3337
    Abstract: Speech in tone languages requires listeners to identify not only phonemes but also tones. As non-tone language users, Korean-native speakers may have difficulty in identifying tones and vowels and processing both tonal and phonemic information at the same time, which are not presented in their mother tongue. The goal of the present study was to investigate the identification of Mandarin Chinese vowels and tones for both native Mandarin Chinese and native Korean speakers with medium and high Chinese proficiency. Results showed that for the identification of Mandarin vowel-plus-tone, vowel, and tone, there was no difference between Chinese- and Korean-native listeners with high Chinese proficiency, whereas Chinese listeners significantly outperformed Korean listeners with medium Chinese proficiency, particularly for tones 1, 3, and 4 and vowel /y/. For Korean listeners, there was no significant correlation between the onset age of Chinese learning and identification scores, while the identification performance significantly correlated with the length of Chinese learning. Moreover, for both Chinese and Korean listeners, identification scores of vowel-plus-tone, tone and vowel are comparable, suggesting that both groups may process dual cues (vowel and tone) as efficiently as individual cues (vowel or tone).
    Type of Medium: Online Resource
    ISSN: 0001-4966 , 1520-8524
    URL: Article
    DOI: 10.1121/1.4970644
    RVK:
    EQ 1000
    Language: English
    Publisher: Acoustical Society of America (ASA)
    Publication Date: 2016
    detail.hit.zdb_id: 1461063-2
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  • 2
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    Aging effect on Mandarin Chinese vowel and tone identification
    Acoustical Society of America (ASA) ; 2015
    In:  The Journal of the Acoustical Society of America Vol. 138, No. 4 ( 2015-10-01), p. EL411-EL416
    Details
    In: The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 138, No. 4 ( 2015-10-01), p. EL411-EL416
    Abstract: Mandarin Chinese speech sounds (vowels × tones) were presented to younger and older Chinese-native speakers with normal hearing. For the identification of vowel-plus-tone, vowel-only, and tone-only, younger listeners significantly outperformed older listeners. The tone 3 identification scores correlated significantly with the age of older listeners. Moreover, for older listeners, the identification rate of vowel-plus-tone was significantly lower than that of vowel-only and tone-only, whereas for younger listeners, there was no difference among the three identification scores. Therefore, aging negatively affected Mandarin vowel and tone perception, especially when listeners needed to process both phonemic and tonal information.
    Type of Medium: Online Resource
    ISSN: 0001-4966 , 1520-8524
    URL: Article
    DOI: 10.1121/1.4933234
    RVK:
    EQ 1000
    Language: English
    Publisher: Acoustical Society of America (ASA)
    Publication Date: 2015
    detail.hit.zdb_id: 1461063-2
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  • 3
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    Inversion of range-dependent ocean environmental parameters using radiation noises of an Autonomous Underwater Vehicle
    Acoustical Society of America (ASA) ; 2018
    In:  The Journal of the Acoustical Society of America Vol. 144, No. 3_Supplement ( 2018-09-01), p. 1982-1982
    Details
    In: The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 144, No. 3_Supplement ( 2018-09-01), p. 1982-1982
    Abstract: Moving platform is playing an increasingly important role in ocean observatories. We previously reported some field testing results of using the radiation noises of an Autonomous Underwater Vehicle (AUV) as the sound source to invert the range-independent SSP. To incorporate source motion effects, the forward model based on the waveguide Doppler and normal mode theory was applied to compute the replica field, and to resolve the adjacent Doppler shifted frequencies, an analytical solution of the forward model and its simplified version were obtained for arbitrary signal integration intervals with a monochromatic source. In this paper, we reformulate the matched-field inversion problem into a state-space model to track the range-dependent environmental parameters and moving source parameters along the AUV path with the constantly updated measurement equations. Performances of several sequential filters, including extended Kalman, unscented Kalman, and particle filters, are compared. Note that at each point of the track, the estimate is the average from the source to the receiver; by doing the inversion sequentially with AUV moving, one can get the parameter estimate at individual points (sections). This process is equivalent to iteration over space, while iteration over time is considered as a solution to an under-determined inverse problem.
    Type of Medium: Online Resource
    ISSN: 0001-4966 , 1520-8524
    URL: Article
    DOI: 10.1121/1.5068654
    RVK:
    EQ 1000
    Language: English
    Publisher: Acoustical Society of America (ASA)
    Publication Date: 2018
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  • 4
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    Pilot studies on zebrafish echocardiography and zebrafish ultrasound vibro-elastography
    Acoustical Society of America (ASA) ; 2020
    In:  The Journal of the Acoustical Society of America Vol. 148, No. 4_Supplement ( 2020-10-01), p. 2450-2450
    Details
    In: The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 148, No. 4_Supplement ( 2020-10-01), p. 2450-2450
    Abstract: Zebrafish are being increasingly used as animal models for human diseases such as cardiomyopathy and neuroblastoma because zebrafish have a nearly fully sequenced genome to humans. One pilot study is to develop zebrafish echocardiography. Because the heart of a zebrafish is small, a high frequency ultrasound system (50–80 MHz) is used for imaging. B-Mode imaging is analyzed for quantification of ejection fraction (EF), end-systolic volume (ESV), and end-diastolic volume (EDV). Pulse-wave Doppler (PWD) is used to calculate the E/A ratio (the peak velocities of E and A waves) and myocardial performance index (MPI). Techniques for improving image quality and repeatability of zebrafish echocardiography are discussed. Another pilot study is to develop zebrafish ultrasound vibro-elastography (ZUVE) for measuring the elastic properties of zebrafish. An adult female zebrafish is anesthetized for 3 min. A 0.1-s gentle harmonic vibration is generated on the tail of a zebrafish using a sphere tip indenter with a 3 mm diameter. Shear wave propagation in the zebrafish is measured using a high frequency 18 MHz ultrasound linear array probe. We conclude that ZUVE is safe, fast, and noninvasive and feasible for testing the elastic properties of zebrafish.
    Type of Medium: Online Resource
    ISSN: 0001-4966 , 1520-8524
    URL: Article
    DOI: 10.1121/1.5146761
    RVK:
    EQ 1000
    Language: English
    Publisher: Acoustical Society of America (ASA)
    Publication Date: 2020
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  • 5
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    Underwater jet noise simulation based on a Large Eddy Simulation/Lighthill hybrid method
    Acoustical Society of America (ASA) ; 2014
    In:  The Journal of the Acoustical Society of America Vol. 136, No. 4_Supplement ( 2014-10-01), p. 2318-2318
    Details
    In: The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 136, No. 4_Supplement ( 2014-10-01), p. 2318-2318
    Abstract: In recent years, extensive researches about the numerical method for aeroacoustics noise simulation have been made. However, the research of hydrodynamic noise develops slowly. In this paper, a hybrid method of combining Large Eddy Simulation (LES) and Lighthill’s acoustic analogy theory is established to compute the hydrodynamic noise, which is based on the preliminary study of the method for aerodynamic noise prediction under low Mach number. First, the model of three-dimensional underwater jet is determined by an experimental model. Meanwhile, the CFD mesh and the acoustic mesh are both prepared. Then, the flow field of underwater jet is simulated with LES. The characteristics of turbulent flow are analyzed by the pressure difference and the uniformity coefficient of velocity. After that, the noise of underwater jet is simulated using the theory of Lighthill’s acoustic analogy. Finally, the solutions obtained by the hybrid method are compared with the experimental data available in open literature. In conclusion, the sound pressure level at the observation point agrees well with the experimental data. The LES/Lighthill hybrid method is able to compute the underwater jet noise and the hydrodynamic noise.
    Type of Medium: Online Resource
    ISSN: 0001-4966 , 1520-8524
    URL: Article
    DOI: 10.1121/1.4900399
    RVK:
    EQ 1000
    Language: English
    Publisher: Acoustical Society of America (ASA)
    Publication Date: 2014
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  • 6
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    Two-dimensional modeling of sound scattering with corrective smoothed particle method
    Acoustical Society of America (ASA) ; 2015
    In:  Journal of the Acoustical Society of America Vol. 137, No. 4_Supplement ( 2015-04-01), p. 2213-2213
    Details
    In: Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 137, No. 4_Supplement ( 2015-04-01), p. 2213-2213
    Abstract: Meshfree methods are widely used in solving acoustic problems, since a set of arbitrary distributed particles can easily represent systems with moving boundaries or a variety of media. Among all meshfree methods, the smoothed particle hydrodynamics (SPH) method is suitable in handling problems with large ranges of density and object separation. This paper aims at using the corrective smoothed particle method (CSPM) to simulate the two-dimensional underwater sound scattering in the time domain. First, a novel kind of acoustic boundary for the CSPM is built and tested with a plane wave model. Then, the CSPM code is used to solve sound scattering field of an infinite long cylinder, which has different computational parameters for the boundary condition. Finally, the distribution of sound scattering pressure obtained with theoretical solutions is used to validate the CSPM code, and the efficiency of the code is analyzed by comparing with the SPH results in the fields of computation time and accuracy. The suitable value of computational parameters of the boundary is also discussed.
    Type of Medium: Online Resource
    ISSN: 0001-4966 , 1520-8524
    URL: Article
    DOI: 10.1121/1.4920060
    RVK:
    EQ 1000
    Language: English
    Publisher: Acoustical Society of America (ASA)
    Publication Date: 2015
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  • 7
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    Suppressing the onset of instabilities in the time-domain equivalent source method using a multistep approach
    Acoustical Society of America (ASA) ; 2017
    In:  The Journal of the Acoustical Society of America Vol. 141, No. 6 ( 2017-06-01), p. 4810-4821
    Details
    In: The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 141, No. 6 ( 2017-06-01), p. 4810-4821
    Abstract: Numerical instability is an important issue that should be addressed in the time-domain equivalent source method (TESM). This study proposes a multistep method to stabilize TESM when using the measured acoustic pressure data to optimize equivalent source strengths. Unlike the conventional single-step method that solves each time step in the time-marching process of TESM, the proposed method performs a one-time solution for several time steps. The multistep solution can potentially reduce the accumulation rate of error, and improves filtering effects by changing the structure of the matrix that needs to be inverted when the truncated singular value decomposition or Tikhonov regularization is used in the time-marching process. Numerical simulations with three examples demonstrate the effectiveness of the multistep method in improving the stability of solutions compared with the single-step method. Effects of the number of merged time steps on the solutions are also discussed to guide the selection process. Finally, the sensitivity of the multistep method to numerical parameters is investigated to demonstrate its consistency under different configurations of numerical parameters.
    Type of Medium: Online Resource
    ISSN: 0001-4966 , 1520-8524
    URL: Article
    DOI: 10.1121/1.4988945
    RVK:
    EQ 1000
    Language: English
    Publisher: Acoustical Society of America (ASA)
    Publication Date: 2017
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  • 8
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    The improved methods and results of HRBSSS for Mapping the Deep Sea Bottom
    Acoustical Society of America (ASA) ; 2012
    In:  The Journal of the Acoustical Society of America Vol. 131, No. 4_Supplement ( 2012-04-01), p. 3489-3489
    Details
    In: The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 131, No. 4_Supplement ( 2012-04-01), p. 3489-3489
    Abstract: High resolution bathymetric sidescan sonar (HRBSSS) is designed by the Institute of Acoustic, Chinese Academic of Sciences (IACAS). HRBSSS have used the technique of direction of arrival (DOA) estimation. It can work near the sea bottom and mapping the deep sea bottom, and get the high resolution bathymetry and sidescan map, concurrently. HRBSSSs have been mounted on the DTA-6000 deep towed body (maximum work depth 6000m) and the Jiaolong HOV (maximum work depth 7000m). In order to upgrading the performance of the system, a new method for improving the depth accuracy on the nadir of the vehicle and an error correct method for minimizing the influence of the inconsistency among the channels have been developed by IACAS. With these method, we have got the good survey results on the area of the seamount ( & gt;2000m depth) and on the area of the sea plain ( & gt;5000m depth) in the Pacific Ocean in 2011. These methods and results will be introduced in this article.
    Type of Medium: Online Resource
    ISSN: 0001-4966 , 1520-8524
    URL: Article
    DOI: 10.1121/1.4709182
    RVK:
    EQ 1000
    Language: English
    Publisher: Acoustical Society of America (ASA)
    Publication Date: 2012
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  • 9
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    Robust learning with imperfect privileged information
    Elsevier BV ; 2020
    In:  Artificial Intelligence Vol. 282 ( 2020-05), p. 103246-
    Details
    In: Artificial Intelligence, Elsevier BV, Vol. 282 ( 2020-05), p. 103246-
    Type of Medium: Online Resource
    ISSN: 0004-3702
    URL: Article
    DOI: 10.1016/j.artint.2020.103246
    RVK:
    EQ 1000
    RVK:
    SA 2940
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2020
    detail.hit.zdb_id: 1468341-6
    detail.hit.zdb_id: 218797-8
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  • 10
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    Reconstruction of nonstationary sound fields based on a time domain angular spectrum method
    Acoustical Society of America (ASA) ; 2020
    In:  The Journal of the Acoustical Society of America Vol. 148, No. 4 ( 2020-10-01), p. 2123-2136
    Details
    In: The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 148, No. 4 ( 2020-10-01), p. 2123-2136
    Abstract: A time domain angular spectrum method is proposed to reconstruct nonstationary sound fields. In this method, the sound field is expressed as a superposition of a series of plane wave bases, and the plane wave basis is constructed by an impulse response function that relates the time domain angular spectrum to the field point pressure. The impulse response function consists of two parts, the propagating plane waves and the evanescent plane waves, and their physical interpretation is provided. By discretizing the time convolution between the plane wave strength and the impulse response function, the reconstruction can be carried out at each time step, thus providing the advantage of real-time reconstructing sound fields. Since the real-time reconstruction process is non-recursive, it can provide a stable reconstruction. In the reconstruction process, the Tikhonov regularization is introduced at each time step to obtain an appropriate estimation of the plane wave strength. Numerical simulations with an unsteady excitation plate and an experiment with an impacted plate were carried out to demonstrate the feasibility of the proposed method on reconstructing nonstationary sound fields. The effect of numerical parameters on the reconstruction accuracy was also investigated in the numerical simulations.
    Type of Medium: Online Resource
    ISSN: 0001-4966 , 1520-8524
    URL: Article
    DOI: 10.1121/10.0002263
    RVK:
    EQ 1000
    Language: English
    Publisher: Acoustical Society of America (ASA)
    Publication Date: 2020
    detail.hit.zdb_id: 1461063-2
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