Development and Validation of Parallel Acoustic Analysis Method for the Sound Field Design of a Large Space

2018 ◽  
pp. 206-214
Author(s):  
Yuya Murakami ◽  
Kota Yamamoto ◽  
Amane Takei
Keyword(s):  
Acoustic Analysis ◽  
Sound Field ◽  
Analysis Method ◽  
Large Space ◽  
Development And Validation

Application of Coupled Structural Acoustic Analysis and Sensitivity Calculations to a Tire Noise Problem

2012 ◽  
Vol 40 (1) ◽  
pp. 25-41 ◽  
Author(s):  
H. M. R. Aboutorabi ◽  
L. Kung
Keyword(s):  
Performance Improvement ◽  
Acoustic Analysis ◽  
Simulation Analysis ◽  
Analysis Method ◽  
Vehicle Manufacturer ◽  
Element Analysis ◽  
Equipment Manufacturer ◽  
Tire Noise ◽  
Fea Modeling ◽  
Testing Instruments

Abstract REFERENCE: H. M. R. Aboutorabi and L. Kung, “Application of Coupled Structural Acoustic Analysis and Sensitivity Calculations to a Tire Noise Problem,” Tire Science and Technology, TSTCA, Vol. 40, No. 1, January – March 2012, pp. 25–41. ABSTRACT: Tire qualification for an original equipment (OE) program consists of several rounds of submissions by the tire manufacturer for evaluation by the vehicle manufacturer. Tires are evaluated both subjectively, where the tire performance is rated by an expert driver, and objectively, where sensors and testing instruments are used to measure the tire performance. At the end of each round of testing the evaluation results are shared and requirements for performance improvement for the next round are communicated with the tire manufacturer. As building and testing is both expensive and time consuming predictive modeling and simulation analysis that can be applied to the performance of the tire is of great interest and value. This paper presents an application of finite element analysis (FEA) modeling along with experimental verification to solve tire noise objections at certain frequencies raised by an original equipment manufacturer (OEM) account. Coupled structural-acoustic analysis method was used to find modal characteristics of the tire at the objectionable frequencies. Sensitivity calculations were then carried out to evaluate the strength of contribution from each tire component to the identified modes. Based on these findings changes to the construction were proposed and implemented that addressed the noise issue.

scholarly journals Sentiment Analysis Method of Network Text Based on Improved AT-BiGRU Model

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Xinxin Lu ◽  
Hong Zhang
Keyword(s):  
Sentiment Analysis ◽  
Current Method ◽  
Recurrent Network ◽  
Analysis Method ◽  
Large Space ◽  
Spelling Errors ◽  
Training Time ◽  
Proposed Model ◽  
Correct Spelling ◽  
Text Sentiment Analysis

In order to solve the problems existing in the current method of emotional analysis of network text, such as long training time, complex calculation, and large space cost, this paper proposes an Internet text sentiment analysis method based on the improved AT-BiGRU model. Firstly, the textblob package is imported to correct spelling errors before text preprocessing. Secondly, pad_sequences are used to fill in the input layer with a fixed length, the two-way gated recurrent network is used to extract information, and the attention mechanism is used to highlight the key information of the word vector. Finally, the GNU memory unit is transformed, and an improved BiGRU that can adapt to the recursive network structure is constructed. The proposed model is experimentally demonstrated on the SemEval-2014 Task 4 and SemEval-2017 Task 4 datasets. Experimental results show that the proposed model can effectively avoid the text sentiment analysis bias caused by spelling errors and prove the effectiveness of the improved AT-BiGRU model in terms of accuracy, loss rate, and iteration time.

scholarly journals Archaeoacoustic Examination of Lazarica Church

Acoustics ◽  
2019 ◽  
Vol 1 (2) ◽  
pp. 423-438 ◽  
Author(s):  
Zorana Đorđević ◽  
Dragan Novković ◽  
Uroš Andrić
Keyword(s):  
Speech Intelligibility ◽  
Acoustic Analysis ◽  
Sound Field ◽  
Simulation Software ◽  
Central Dome ◽  
Acoustic Effect ◽  
Additional Information ◽  
Medieval Church ◽  
Transmission Index ◽  
Speech Transmission

The acoustic analysis provides additional information on building tradition and related indoor practice that includes sound, thus deepening our understanding of architectural heritage. In this paper, the sound field of the Orthodox medieval church Lazarica (Kruševac city, Serbia) is examined. Lazarica is a representative of Morava architectural style, developed in the final period of the Serbian medieval state, when also the chanting art thrived, proving the importance of the aural environment in Serbian churches. The church plan is a combination of a traditional inscribed cross and a triconch. After the in situ measurement of acoustic impulse response using EASERA software, we built a computer model in the acoustic simulation software EASE and calibrated it accordingly. Following the parameters (reverberation time (T30), early decay time (EDT) and speech transmission index (STI)), we examined the acoustic effect of the space occupancy, central dome and the iconostasis. In all the cases, no significant deviation between T30 and EDT parameter was observed, which indicates uniform sound energy decay. Closing the dome with a flat ceiling did not show any significant impact on T30, but it lowered speech intelligibility. The height of iconostasis showed no significant influence on the acoustics of Lazarica church.

805 Acoustic Analysis of Large Scale Sound Field

2001 ◽  
Vol 2001.54 (0) ◽  
pp. 229-230
Author(s):  
koji MATSUMOTO ◽  
yoichi KANEMITSU ◽  
shinya KIJIMOTO ◽  
koichi MATSUDA
Keyword(s):  
Large Scale ◽  
Acoustic Analysis ◽  
Sound Field

scholarly journals Development and Validation of Rapid Analysis Method for Multi-Class Veterinary Drugs in Livestock Products by LC-MS/MS

2012 ◽  
Vol 53 (5) ◽  
pp. 243-253 ◽  
Author(s):  
Takayuki NAKAJIMA ◽  
Chieko NAGANO ◽  
Takeo SASAMOTO ◽  
Hiroshi HAYASHI ◽  
Maki KANDA ◽  
...  
Keyword(s):  
Rapid Analysis ◽  
Veterinary Drugs ◽  
Analysis Method ◽  
Livestock Products ◽  
Development And Validation

The Method of Real-Time Viewshed Analysis on 3D Virtual Earth

2011 ◽  
Vol 271-273 ◽  
pp. 558-562
Author(s):  
Jing Chen ◽  
Fang Min Zeng ◽  
Shu Tao Dong
Keyword(s):  
Real Time ◽  
New Method ◽  
Earth System ◽  
Analysis Method ◽  
Large Space ◽  
Accuracy Requirement ◽  
Viewshed Analysis ◽  
Local Space ◽  
Real Time Visualization ◽  
Virtual Earth

Traditional viewshed analysis method is usually based on datum plane and local space area, which can not meet the accuracy requirement of the viewshed analysis on 3D Virtual Earth based on datum sphere and large space area. Regarding this, the article discussed a new method of viewshed analysis based on 3D datum sphere, and also realized the real-time visualization of the analysis result based on the 3D Virtual Earth system GeoGlobe. Finally it inspected and verified the validity of the method.

scholarly journals The Influence of Guttural Consonants /χ/, /ħ/, and /h/ on Vowel /a/ in Saudi Arabic

2019 ◽  
Vol 10 (1) ◽  
pp. 115
Author(s):  
Haroon N. Alsager
Keyword(s):  
Comparative Study ◽  
Acoustic Analysis ◽  
Unified Model ◽  
The Other ◽  
Analysis Method ◽  
Formant Frequency ◽  
Natural Class ◽  
Arabic Speakers ◽  
Second Formant ◽  
Saudi Arabic

This paper presents a comparative study which investigates the influence of Saudi Arabic guttural consonants /χ/, /ħ/ and /h/ on the vowel /a/ when they are adjacent and in the same syllable. Cohn (2007, 2009), Flemming (2001), and Keating (1996) discuss a unified model in which phonology and phonetics are treated as two distinct elements of one domain where each element has an effect on the other to some degree. McCarthy (1991, 1994), Rose (1996), Zawaydeh (1999, 2004), and BinMuqbil (2006) presented phonological studies on gutturals, as well as discussions on gutturals as a natural class, which uphold the phonological aspect of Cohn’s (2009) unified model. The aim of this study is to address the phonetic aspect of Cohn’s (2009) unified model by analyzing the phonetic effects of guttural-vowel coarticulation. An acoustic analysis method was used as a framework for this investigation to extract first formant frequency (F1) and second formant frequency (F2) to measure the influence in the coarticulation. For the purpose of this study, seven native Saudi Arabic speakers were recorded pronouncing 70 Saudi Arabic words. The results showed that guttural consonants have an influence on the vowel /a/ by lowering and backing it when they are adjacent and in the same syllable, while the vowel /a/ in the nonguttural consonants is raising and fronting their adjacent vowel /a/ in the same syllable in comparison with the vowel /a/ in the guttural environment.

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