Akustika最新文献_第4页

TRAFFIC CONTROL AT THE AIRPORT BASED ON ACOUSTIC SCANNING 基于声波扫描的机场交通管制

Akustika Pub Date : 2021-01-01 DOI: 10.36336/akustika202141186

A. Shvetsov, Viktor Gromov

{"title":"TRAFFIC CONTROL AT THE AIRPORT BASED ON ACOUSTIC SCANNING","authors":"A. Shvetsov, Viktor Gromov","doi":"10.36336/akustika202141186","DOIUrl":"https://doi.org/10.36336/akustika202141186","url":null,"abstract":"The round-the-clock vehicles operation at the airports, including in low visibility conditions with fog, snowfall, etc., requires the development of new methods for monitoring their traffic, including those that do not require direct visual contact between the dispatcher and the vehicles. In this study, a method for monitoring airport traffic based on acoustic scanning of the territory has been developed. The method allows you to control traffic remotely, including in conditions of ‘zero’ visibility. Controlled vehicles include ground vehicles that ensure airport operation, including tractors, tankers, buses for delivering passengers and the crew to the aircraft, snow plows, cars, etc. The method provides equipping the airport territory where vehicle traffic is possible with a network of acoustic sensors configured to detect noise generated by vehicle traffic, which allows you to receive traffic data on the airport territory. The structure of the airport traffic control system based on acoustic scanning and the algorithm of its operation is developed in the study for practical implementation of the method. To configure the acoustic sensors, which are the main element of the system, the noise generated by various types of airport vehicles was measured. The proposed method and the system implementing it can be used to prevent emergencies, as well as to ensure aviation security at airports.","PeriodicalId":42295,"journal":{"name":"Akustika","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70175592","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

ATTENTUATION OF THE OUTPUT SIGNAL BY PROTECTIVE AND FIXING TOOLS FOR HEARING AIDS AND COCHLEAR IMPLANTS 助听器和人工耳蜗植入用保护和固定工具对输出信号的衰减

Akustika Pub Date : 2021-01-01 DOI: 10.36336/akustika202141163

Sergei Levin, G. Tufatulin, I. Koroleva, Viktoriia Vasilyeva, E. Levina

引用次数: 0

ASSESSING EXPOSURE TO NOISE IN HIGH DENSITY URBAN AREAS 评估高密度市区的噪音暴露程度

Akustika Pub Date : 2021-01-01 DOI: 10.36336/akustika20214156

I. May, D. Koshurnikov

{"title":"ASSESSING EXPOSURE TO NOISE IN HIGH DENSITY URBAN AREAS","authors":"I. May, D. Koshurnikov","doi":"10.36336/akustika20214156","DOIUrl":"https://doi.org/10.36336/akustika20214156","url":null,"abstract":"The present research dwells on existing methodical approaches to modeling and noise assessment involving mapping procedures in high density urban areas by the example of urbanized territories in a big city. The suggested approach is based on results obtained via multiple acoustic computations that were performed using specialized software packages. Computed data are interfaced with geoinformation systems for further visualization and quantitative assessment of obtained results. As regards hygienic standardization, hardware and software that are used within the approach allow accomplishing it in high density urban areas. The research concentrates on basic approaches to creating a calculated model as well as parameters of all accomplished computations. The research was performed as per a regular grid within a calculated rectangle sized 0.8*0.8 km and with a step being equal to 25 meters. This calculated rectangle contained 1,122 points. Overall, computed exposure was determined at 486,246 points located in 43 planes. A separate calculated grid corresponded to each of them in order to build a 3D model. This 3D model was made up of 43 planes including one built at 1.5 meter height in a residential area. This 3D model was created for assessing living conditions depending on a height of living (a floor in a residential building). A square of acoustic discomfort was assessed depending on a height as per such a hygienic criterion as noise exceeding 55 dBA and it allowed establishing effects produced by motor transport on noise levels. This research is an initial stage in substantiating violations of citizens’ rights for a favorable living environment and human well-being; in future it is planned to perform instrumental measurements and assess health risks.","PeriodicalId":42295,"journal":{"name":"Akustika","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70176571","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

DEVELOPMENT AND ANALYSIS OF NEW THEORETICAL MODELS OF GAS DYNAMIC PARAMETERS OF LOW-FREQUENCY PRESSURE PULSATIONS IN EXHAUST TRACTS 排气道低频压力脉动气体动力学参数新理论模型的建立与分析

Akustika Pub Date : 2021-01-01 DOI: 10.36336/akustika20214161

Anna Lubyanchenko, A. Shashurin, N. Ivanov

引用次数: 0

FEATURES OF NOISE REDUCTION IN GAS PATHS OF BOILERS DURING CONDENSATION OF WATER VAPOR FROM FLUE GASES 锅炉烟气水蒸汽冷凝过程中烟气路径降噪特性研究

Akustika Pub Date : 2021-01-01 DOI: 10.36336/akustika202141217

Evgenii Zhuralev, D. Chugunkov, G. Seyfelmlyukova

引用次数: 0

METHOD FOR ESTABLISHING THE SEVENTH SUBZONE OF THE AERODROME AREA 机场第七个分区的建立方法

Akustika Pub Date : 2021-01-01 DOI: 10.36336/akustika20214183

D. Koshurnikov, Mikhail Kartyshev

{"title":"METHOD FOR ESTABLISHING THE SEVENTH SUBZONE OF THE AERODROME AREA","authors":"D. Koshurnikov, Mikhail Kartyshev","doi":"10.36336/akustika20214183","DOIUrl":"https://doi.org/10.36336/akustika20214183","url":null,"abstract":"The existing regulatory and methodical base does not provide for establishing airport zones (AZs). There are no unified approaches to establishing relevant boundaries, control over them, and substantiating limitations on use of land spots. The developed procedure for establishing the sanitary (seventh) subzone in an AZ creates a universal algorithm for determining boundaries of this subzone in any AZ. Methodical approaches contain requirements to creating boundaries of the sanitary (seventh) subzone including relevant computations, computed boundaries being verified with instrumental observations (measurements), zoning the sanitary (seventh) subzone as per health risk criteria, and subsequent production control. Airports used in civil aviation have been differentiated for the first time within the procedure; it was done in order to separate requirements to accomplishing both verifying measurements and production control. Besides, approaches to zoning the sanitary (seventh) subzone in an AZ as per health risk criteria have been implemented for the first time; these criteria are applied to determine limitations on use of land spots. Averaged daily noise level (LAd) was used as a noise exposure indictor. Four zones with different risk levels were determined with different types of economic activities to be performed in them depending on functions of capital construction objects located there.","PeriodicalId":42295,"journal":{"name":"Akustika","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70177272","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

THEORETICAL RESEARCH STUDIES OF REGULARITIES FORMATION OF ACOUSTIC CHARACTERISTICS FOR THREADING AND SPLINE SHAFT MILLING MACHINE 对螺纹花键轴铣床声特性形成规律的理论研究

Akustika Pub Date : 2021-01-01 DOI: 10.36336/akustika202141189

A. Nabokov, Ivan Yaistkov, A. Chukarin

引用次数: 0

TEST METHOD TO DETERMINE THE ACOUSTIC PROPERTIES OF BUILDING MATERIAL BY USING MICROPHONE IMPEDANCE TUBE 用传声器阻抗管测定建筑材料声学特性的试验方法

Akustika Pub Date : 2021-01-01 DOI: 10.36336/akustika20214036

Sourabh Dogra, Arpan Gupta

{"title":"TEST METHOD TO DETERMINE THE ACOUSTIC PROPERTIES OF BUILDING MATERIAL BY USING MICROPHONE IMPEDANCE TUBE","authors":"Sourabh Dogra, Arpan Gupta","doi":"10.36336/akustika20214036","DOIUrl":"https://doi.org/10.36336/akustika20214036","url":null,"abstract":"The paper discusses a simple and low-cost method to design four microphone impedance tube of measuring the acoustic properties of building materials. The acoustic properties of the material are defined by the reflection coefficient, absorption coefficient, and transmission coefficient. The experimental setup follows the ASTM-E2611 standard of four microphone impedance tube with two load boundary conditions to measure these coefficients. The setup consists of four microphones around a brass tube with the speaker at one end and termination at the other. Raw data from the four microphones is obtained through a Virtual Instrument (VI) program developed in LabView. The novelty in the design is the tapered connection between the two pipes connected via the sample holder. The mathematical equation involved in estimating acoustical properties is solved in MATLAB 2019a. The reflection and absorption coefficient data of ephony fibbrette of 15 mm thickness are compared with the data provided by an accredited laboratory. The experimental results of the in-house designed impedance tube are in good agreement with the lab results. This material is used in the auditorium, theatres for hearing comfort. Further, two new samples of ephony fibbrette along with wood fibre cement and damper has been analysed. It has been found that adding a layer of wood fibre results in an increase in the absorption coefficient whereas the addition of the damper results in an increase in the reflection coefficient.","PeriodicalId":42295,"journal":{"name":"Akustika","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70174659","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

REDUCING THE NOISE LOAD ON WILDLIFE DURING SCIENTIFIC EXPEDITIONS 减少科学考察期间野生动物的噪音负荷

Akustika Pub Date : 2021-01-01 DOI: 10.36336/akustika202141112

A. Shvetsov

引用次数: 0

SEPARATION OF THE CONTRIBUTIONS OF "OWN" AND "SHIFT" NOISE AND DETERMINATION OF GAS-DYNAMIC AND ACOUSTIC PARAMETERS OF SILENCERS 分离“自身”噪声和“移位”噪声的贡献，确定消声器的气动力和声学参数

Akustika Pub Date : 2021-01-01 DOI: 10.36336/akustika202141150

A. Shashurin, N. Ivanov, Anna Lubyanchenko, Viktoriia Vasilyeva

引用次数: 0