noise meter 30 130db digital sound level meter gm1357 noise tester in decibels lcd ac fastslow db screen with carry box



Saeed Vaseghi V. Advanced Digital Signal Processing and Noise Reduction Saeed Vaseghi V. Advanced Digital Signal Processing and Noise Reduction Новинка

Saeed Vaseghi V. Advanced Digital Signal Processing and Noise Reduction

Digital signal processing plays a central role in the development of modern communication and information processing systems. The theory and application of signal processing is concerned with the identification, modelling and utilisation of patterns and structures in a signal process. The observation signals are often distorted, incomplete and noisy and therefore noise reduction, the removal of channel distortion, and replacement of lost samples are important parts of a signal processing system. The fourth edition of Advanced Digital Signal Processing and Noise Reduction updates and extends the chapters in the previous edition and includes two new chapters on MIMO systems, Correlation and Eigen analysis and independent component analysis. The wide range of topics covered in this book include Wiener filters, echo cancellation, channel equalisation, spectral estimation, detection and removal of impulsive and transient noise, interpolation of missing data segments, speech enhancement and noise/interference in mobile communication environments. This book provides a coherent and structured presentation of the theory and applications of statistical signal processing and noise reduction methods. Two new chapters on MIMO systems, correlation and Eigen analysis and independent component analysis Comprehensive coverage of advanced digital signal processing and noise reduction methods for communication and information processing systems Examples and applications in signal and information extraction from noisy data Comprehensive but accessible coverage of signal processing theory including probability models, Bayesian inference, hidden Markov models, adaptive filters and Linear prediction models Advanced Digital Signal Processing and Noise Reduction is an invaluable text for postgraduates, senior undergraduates and researchers in the fields of digital signal processing, telecommunications and statistical data analysis. It will also be of interest to professional engineers in telecommunications and audio and signal processing industries and network planners and implementers in mobile and wireless communication communities.
Shahram Taherzadeh Noise Control Shahram Taherzadeh Noise Control Новинка

Shahram Taherzadeh Noise Control

Designed to accompany the new Open University course in Environmental Monitoring and Protection, this is one of four new titles which will equip the reader with the tools to undertake Environmental Impact Assessments (EIAs). Used in planning, decision-making and management, EIAs review both the theoretical principles and environmental considerations of engineering and environmental projects to help steer fundamental legislation in the right direction. This book will cover the basic principles and concepts of sound and sound propagation, covering units, criteria and indices. It considers noise propagation and attenuation, before leading on to assessment methods for both industrial and transport noise. It includes models for predicting sound levels both indoors and outdoors, and details methods for noise control and abatement. Discover our e-book series on Environmental Monitoring and Protection, published in partnership with The Open University! Find out more about the series editors, the titles in the series and their focus on water, noise, air and waste, and The Open University courses in Environmental Management. Visit www.wiley.com/go/ouebookseries
Venceslav Kroupa F. Frequency Stability. Introduction and Applications Venceslav Kroupa F. Frequency Stability. Introduction and Applications Новинка

Venceslav Kroupa F. Frequency Stability. Introduction and Applications

An in-depth look at the theory and applications of frequency stability An understanding of the acquisition of stable frequency is essential for anyone who needs to solve noise problems in wireless communications. This book offers a thorough introduction to the principles and applications of frequency stability, arming practicing engineers with the tools they need to minimize noise in systems and devices that affect everyday communications for millions of people. With an emphasis on both practical and scientific points of view, Frequency Stability: Introduction and Applications examines frequency and time fluctuations in resonators, as well as the stability of both standard and practical microwave oscillators. It explains noise properties of building circuit blocks, introducing time domain properties and how they relate to noise spectral densities. Including a special chapter devoted to the design and properties of phase locked loops—a crucial topic for frequency synthesizers—the book also: Examines in detail L/F noise, showing how power losses in the propagation material extend over a long period of time Covers sapphire, optoelectronics, MW, and ring oscillators with the discussion of noise in delay-line oscillators with lasers Offers an extended treatment of phase noise in semiconductors and amplifiers based on Van der Ziel investigations Emphasizes the modified Allan variance in the time domain, including exact computations Outlines the relationship between resonator frequency and output phase noises via the feedback theory Featuring numerous tables with actual data, Frequency Stability: Introduction and Applications is an invaluable guide for engineers wishing to rein in acoustic and electromagnetic interference in modern communications.
M. L. Munjal Acoustics of Ducts and Mufflers M. L. Munjal Acoustics of Ducts and Mufflers Новинка

M. L. Munjal Acoustics of Ducts and Mufflers

10501.54 руб. Найти похожее
Fully updated second edition of the premier reference book on muffler and lined duct acoustical performance Engine exhaust noise pollutes the street environment and ventilation fan noise enters dwellings along with fresh air. People have become conscious of their working environment. Governments of most countries have responded to popular demand with mandatory restrictions on sound emitted by automotive engines, and a thorough knowledge of acoustics of ducts and mufflers is needed for the design of efficient muffler configurations. This fully updated Second Edition of Acoustics of Ducts and Mufflers deals with propagation, reflection and dissipation/absorption of sound along ducts/pipes/tubes, area discontinuities, perforated elements and absorptive linings that constitute the present-day mufflers and silencers designed to control noise of exhaust and intake systems of automotive engines, diesel-generator sets, compressors and HVAC systems. It includes equations, figures, tables, references, and solved examples and unsolved exercises with answers, so it can be used as a text book as well as a reference book. It also offers a complete presentation and analysis of the major topics in sound suppression and noise control for the analysis and design of acoustical mufflers, air conditioning and ventilation duct work. Both the fundamentals and the latest technology are discussed, with an emphasis on applications. Deals with reactive mufflers, dissipative silencers, the frequency-domain approach, and the time-domain approach. Fully updated second edition of the premier reference book on muffler and lined duct acoustical performance, in one complete volume Presents original new research on topics including baffle silencers and louvers, 3D analytical techniques, and flow-acoustic analysis of multiply-connected perforated-element mufflers Includes a general design procedure to help muffler designers in the automotive industry, exhaust noise being a major component of automobile and traffic noise pollution Written by an expert with four decades’ experience in teaching to graduate students, publishing extensively in reputed international journals, and consulting with industry for noise control as well as designing for quietness
Andreas Scherer Batch Effects and Noise in Microarray Experiments. Sources and Solutions Andreas Scherer Batch Effects and Noise in Microarray Experiments. Sources and Solutions Новинка

Andreas Scherer Batch Effects and Noise in Microarray Experiments. Sources and Solutions

Batch Effects and Noise in Microarray Experiments: Sources and Solutions looks at the issue of technical noise and batch effects in microarray studies and illustrates how to alleviate such factors whilst interpreting the relevant biological information. Each chapter focuses on sources of noise and batch effects before starting an experiment, with examples of statistical methods for detecting, measuring, and managing batch effects within and across datasets provided online. Throughout the book the importance of standardization and the value of standard operating procedures in the development of genomics biomarkers is emphasized. Key Features: A thorough introduction to Batch Effects and Noise in Microrarray Experiments. A unique compilation of review and research articles on handling of batch effects and technical and biological noise in microarray data. An extensive overview of current standardization initiatives. All datasets and methods used in the chapters, as well as colour images, are available on www.the-batch-effect-book.org, so that the data can be reproduced. An exciting compilation of state-of-the-art review chapters and latest research results, which will benefit all those involved in the planning, execution, and analysis of gene expression studies.
Anders Brandt Noise and Vibration Analysis. Signal Analysis and Experimental Procedures Anders Brandt Noise and Vibration Analysis. Signal Analysis and Experimental Procedures Новинка

Anders Brandt Noise and Vibration Analysis. Signal Analysis and Experimental Procedures

Noise and Vibration Analysis is a complete and practical guide that combines both signal processing and modal analysis theory with their practical application in noise and vibration analysis. It provides an invaluable, integrated guide for practicing engineers as well as a suitable introduction for students new to the topic of noise and vibration. Taking a practical learning approach, Brandt includes exercises that allow the content to be developed in an academic course framework or as supplementary material for private and further study. Addresses the theory and application of signal analysis procedures as they are applied in modern instruments and software for noise and vibration analysis Features numerous line diagrams and illustrations Accompanied by a web site at www.wiley.com/go/brandt with numerous MATLAB tools and examples. Noise and Vibration Analysis provides an excellent resource for researchers and engineers from automotive, aerospace, mechanical, or electronics industries who work with experimental or analytical vibration analysis and/or acoustics. It will also appeal to graduate students enrolled in vibration analysis, experimental structural dynamics, or applied signal analysis courses.
On Screen: Level B2+ (аудиокурс на 4 CD) On Screen: Level B2+ (аудиокурс на 4 CD) Новинка

On Screen: Level B2+ (аудиокурс на 4 CD)

On Screen B2+ is a modular course at CEF Level B2+. The course combines active learning with a variety of lively topics presented in eight themed modules.
Almudena Suarez Analysis and Design of Autonomous Microwave Circuits Almudena Suarez Analysis and Design of Autonomous Microwave Circuits Новинка

Almudena Suarez Analysis and Design of Autonomous Microwave Circuits

13211.62 руб. Найти похожее
Presents simulation techniques that substantially increase designers' control over the oscillationin autonomous circuits This book facilitates a sound understanding of the free-running oscillation mechanism, the start-up from the noise level, and the establishment of the steady-state oscillation. It deals with the operation principles and main characteristics of free-running and injection-locked oscillators, coupled oscillators, and parametric frequency dividers. Analysis and Design of Autonomous Microwave Circuits provides: An exploration of the main nonlinear-analysis methods, with emphasis on harmonic balance and envelope transient methods Techniques for the efficient simulation of the most common autonomous regimes A presentation and comparison of the main stability-analysis methods in the frequency domain A detailed examination of the instabilization mechanisms that delimit the operation bands of autonomous circuits Coverage of techniques used to eliminate common types of undesired behavior, such as spurious oscillations, hysteresis, and chaos A thorough presentation of the oscillator phase noise A comparison of the main methodologies of phase-noise analysis Techniques for autonomous circuit optimization, based on harmonic balance A consideration of different design objectives: presetting the oscillation frequency and output power, increasing efficiency, modifying the transient duration, and imposing operation bands Analysis and Design of Autonomous Microwave Circuits is a valuable resource for microwave designers, oscillator designers, and graduate students in RF microwave design.
Kedrick Brown Trend Trading. Timing Market Tides Kedrick Brown Trend Trading. Timing Market Tides Новинка

Kedrick Brown Trend Trading. Timing Market Tides

Written in a straightforward and accessible style, Trend Trading teaches you how to trade equity trends with sound money management discipline, from the individual stock level to the whole portfolio level. Tailored to investors who want to use elements of trend following strategies in their equity portfolios, Trend Trading presents unique investment tools and advanced technical analysis methods in simple, commonsense terms.
Майка классическая Printio Terror noise division Майка классическая Printio Terror noise division Новинка

Майка классическая Printio Terror noise division

Майка классическая — цвет: белый, пол: Жен. Очень брутальная футболка с очень брутальным принтом. Выбор брутальных людей.
Майка классическая Printio Terror noise division Майка классическая Printio Terror noise division Новинка

Майка классическая Printio Terror noise division

Майка классическая — цвет: белый, пол: Муж. Очень брутальная футболка с очень брутальным принтом. Выбор брутальных людей.
Сумка Printio Terror noise division Сумка Printio Terror noise division Новинка

Сумка Printio Terror noise division

Сумка. Очень брутальная футболка с очень брутальным принтом. Выбор брутальных людей.
Футболка классическая Printio Terror noise division Футболка классическая Printio Terror noise division Новинка

Футболка классическая Printio Terror noise division

Футболка классическая — цвет: белый, пол: Жен. Очень брутальная футболка с очень брутальным принтом. Выбор брутальных людей.
Футболка классическая Printio Terror noise division Футболка классическая Printio Terror noise division Новинка

Футболка классическая Printio Terror noise division

Футболка классическая — цвет: белый, пол: Муж. Очень брутальная футболка с очень брутальным принтом. Выбор брутальных людей.
Лонгслив Printio Terror noise division Лонгслив Printio Terror noise division Новинка

Лонгслив Printio Terror noise division

Лонгслив — цвет: белый, пол: Муж. Очень брутальная футболка с очень брутальным принтом. Выбор брутальных людей.
Yang-Hann Kim Sound Propagation. An Impedance Based Approach Yang-Hann Kim Sound Propagation. An Impedance Based Approach Новинка

Yang-Hann Kim Sound Propagation. An Impedance Based Approach

10836.92 руб. Найти похожее
In Sound Propagation: An Impedance Based Approach, Professor Yang-Hann Kim introduces acoustics and sound fields by using the concept of impedance. Kim starts with vibrations and waves, demonstrating how vibration can be envisaged as a kind of wave, mathematically and physically. One-dimensional waves are used to convey the fundamental concepts. Readers can then understand wave propagation in terms of characteristic and driving point impedance. The essential measures for acoustic waves, such as dB scale, octave scale, acoustic pressure, energy, and intensity, are explained. These measures are all realized by one-dimensional examples, which provide mathematically simplest but clear enough physical insights. Kim then moves on to explaining waves on a flat surface of discontinuity, demonstrating how propagation characteristics of waves change in space when there is a distributed impedance mismatch. Next is a chapter on radiation, scattering, and diffraction, where Kim shows how these topics can be explained in a unified way, by seeing the changes of waves due to spatially distributed impedance. Lastly, Kim covers sound in closed space, which is considered to be a space that is surrounded by spatially distributed impedance, and introduces two spaces: acoustically large and small space. The bulk of the book is concerned with introducing core fundamental concepts, but the appendices are included as the essentials as well to cover other important topics to extend learning. Offers a less mathematically-intensive means to understand the subject matter Provides an excellent launching point for more advanced study or for review of the basics Based on classroom tested materials developed over the course of two decades Companion site for readers, containing animations and MATLAB code downloads Videos and impedance data available from the author's website Presentation slides available for instructor use Sound Propagation is geared towards graduate students and advanced undergraduates in acoustics, audio engineering, and noise control engineering. Practicing engineers and researchers in audio engineering and noise control, or students in engineering and physics disciplines, who want to gain an understanding of sound and vibration concepts, will also find the book to be a helpful resource.
Водолазки и лонгсливы Coccodrillo Лонгслив для мальчика Noise Водолазки и лонгсливы Coccodrillo Лонгслив для мальчика Noise Новинка

Водолазки и лонгсливы Coccodrillo Лонгслив для мальчика Noise

​Coccodrillo Лонгслив для мальчика Noise утепленный детский жилет - замечательное решение для весны. Жилет имеет воротник-стойку, защищающий от продувания. Фронтальная застежка молния. Украшает изделие небольшой бантик и оборка снизу. Состав: 60% хлопок, 40% полиэстер Уход за изделием: автомат до 40%
Mi Noise Canceling Earphones Black Mi Noise Canceling Earphones Black Новинка

Mi Noise Canceling Earphones Black

Mi Noise Cancelling Earphones - высокотехнологичные проводные наушники с системой шумоподавления, созданные специально для ценителей звука. В зависимости от окружающей обстановки вы можете выбрать активное шумоподавление с частотой 50-1500 Гц или максимальное подавление шума на 20 дБ. Эргономичный дизайн вкладышей не доставит дискомфорта даже при длительном использовании.
Joseph Goodman W. Statistical Optics Joseph Goodman W. Statistical Optics Новинка

Joseph Goodman W. Statistical Optics

This book discusses statistical methods that are useful for treating problems in modern optics, and the application of these methods to solving a variety of such problems This book covers a variety of statistical problems in optics, including both theory and applications. The text covers the necessary background in statistics, statistical properties of light waves of various types, the theory of partial coherence and its applications, imaging with partially coherent light, atmospheric degradations of images, and noise limitations in the detection of light. New topics have been introduced in the second edition, including: Analysis of the Vander Pol oscillator model of laser light Coverage on coherence tomography and coherence multiplexing of fiber sensors An expansion of the chapter on imaging with partially coherent light, including several new examples An expanded section on speckle and its properties New sections on the cross-spectrum and bispectrum techniques for obtaining images free from atmospheric distortions A new section on imaging through atmospheric turbulence using coherent light The addition of the effects of “read noise” to the discussions of limitations encountered in detecting very weak optical signals A number of new problems and many new references have been added Statistical Optics, Second Edition is written for researchers and engineering students interested in optics, physicists and chemists, as well as graduate level courses in a University Engineering or Physics Department.
Блузки и рубашки Coccodrillo Рубашка для мальчика Noise Блузки и рубашки Coccodrillo Рубашка для мальчика Noise Новинка

Блузки и рубашки Coccodrillo Рубашка для мальчика Noise

Рубашка для мальчика Coccodrillo Noise. Клетчатая рубашка с капюшоном. Спереди один накладной нагрудный карман. На длинных рукавах манжеты на кнопках. Нижний край немного закруглен. Капюшон и кокетка спереди и на спинке однотонного цвета. Спереди удобная планка на кнопки.
Брюки, джинсы и штанишки Coccodrillo Брюки для мальчика Noise Брюки, джинсы и штанишки Coccodrillo Брюки для мальчика Noise Новинка

Брюки, джинсы и штанишки Coccodrillo Брюки для мальчика Noise

Брюки для мальчика Coccodrillo Noise. Повседневные брюки для мальчиков выполнены из эластичного хлопка. Хорошо сидят и не сковывают движения. Имеют втачные карманы по бокам. На талии трикотажный пояс с кулиской. В области коленей специальные вытачки спереди и отстрочка сзади.
Колесо для грызунов бесшумное Beeztees Noise Free Колесо для грызунов бесшумное Beeztees Noise Free Новинка

Колесо для грызунов бесшумное Beeztees Noise Free

Колесо для грызунов бесшумное Beeztees Noise Free станет замечательным приобретением для обладателей грызунов. Грызунам, живущим в домашних условиях, просто необходимо колесо для поддержания физической формы. Тренируясь на колесе, животное расходует свою энергию и не набирает избыточный вес, который может навредить его здоровью. Колесо выполнено из пластмассы, бесшумное, поэтому не доставит неудобств хозяевам животного.
William Mark D. Performance-Based Gear Metrology. Kinematic - Transmission - Error Computation and Diagnosis William Mark D. Performance-Based Gear Metrology. Kinematic - Transmission - Error Computation and Diagnosis Новинка

William Mark D. Performance-Based Gear Metrology. Kinematic - Transmission - Error Computation and Diagnosis

A mathematically rigorous explanation of how manufacturing deviations and damage on the working surfaces of gear teeth cause transmission-error contributions to vibration excitations Some gear-tooth working-surface manufacturing deviations of significant amplitude cause negligible vibration excitation and noise, yet others of minuscule amplitude are a source of significant vibration excitation and noise. Presently available computer-numerically-controlled dedicated gear metrology equipment can measure such error patterns on a gear in a few hours in sufficient detail to enable accurate computation and diagnosis of the resultant transmission-error vibration excitation. How to efficiently measure such working-surface deviations, compute from these measurements the resultant transmission-error vibration excitation, and diagnose the manufacturing source of the deviations, is the subject of this book. Use of the technology in this book will allow quality spot checks to be made on gears being manufactured in a production run, to avoid undesirable vibration or noise excitation by the manufactured gears. Furthermore, those working in academia and industry needing a full mathematical understanding of the relationships between tooth working-surface deviations and the vibration excitations caused by these deviations will find the book indispensable for applications pertaining to both gear-quality and gear-health monitoring. Key features: Provides a very efficient method for measuring parallel-axis helical or spur gears in sufficient detail to enable accurate computation of transmission-error contributions from working-surface deviations, and algorithms required to carry out these computations, including examples Provides algorithms for computing the working-surface deviations causing any user-identified tone, such as ‘ghost tones,’ or ‘sidebands’ of the tooth-meshing harmonics, enabling diagnosis of their manufacturing causes, including examples Provides explanations of all harmonics observed in gear-caused vibration and noise spectra. Enables generation of three-dimensional displays and detailed numerical descriptions of all measured and computed working-surface deviations, including examples
Dirty Money Starter/Beginner Book with Audio CD Dirty Money Starter/Beginner Book with Audio CD Новинка

Dirty Money Starter/Beginner Book with Audio CD

Award-winning original fiction for learners of English. At seven levels, from Starter to Advanced, this impressive selection of carefully graded readers offers exciting reading for every student's capabilities. Joe lives in Canada, in a beautiful, quiet place. His peace is interrupted one day by the noise of bulldozers excavating near his house. He is told that it's a diamond mine. Joe is a journalist for a local newspaper and his neighbours soon come to ask him to write about the awful noise and destruction. Joe becomes suspicious when his boss won't let him write about it. He starts to investigate the mine, but gets himself in harm's way. This pack includes a paperback and Audio CD with complete text recordings from the book.
Virginia Evans, Jenny Dooley On Screen B2: Teacher's Book Virginia Evans, Jenny Dooley On Screen B2: Teacher's Book Новинка

Virginia Evans, Jenny Dooley On Screen B2: Teacher's Book

On Screen B2 is a modular course at CEF Level B2.The course combines active learning with a variety of lively topics presented in eight themed modules.

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In Sound Propagation: An Impedance Based Approach, Professor Yang-Hann Kim introduces acoustics and sound fields by using the concept of impedance. Kim starts with vibrations and waves, demonstrating how vibration can be envisaged as a kind of wave, mathematically and physically. One-dimensional waves are used to convey the fundamental concepts. Readers can then understand wave propagation in terms of characteristic and driving point impedance. The essential measures for acoustic waves, such as dB scale, octave scale, acoustic pressure, energy, and intensity, are explained. These measures are all realized by one-dimensional examples, which provide mathematically simplest but clear enough physical insights. Kim then moves on to explaining waves on a flat surface of discontinuity, demonstrating how propagation characteristics of waves change in space when there is a distributed impedance mismatch. Next is a chapter on radiation, scattering, and diffraction, where Kim shows how these topics can be explained in a unified way, by seeing the changes of waves due to spatially distributed impedance. Lastly, Kim covers sound in closed space, which is considered to be a space that is surrounded by spatially distributed impedance, and introduces two spaces: acoustically large and small space. The bulk of the book is concerned with introducing core fundamental concepts, but the appendices are included as the essentials as well to cover other important topics to extend learning. Offers a less mathematically-intensive means to understand the subject matter Provides an excellent launching point for more advanced study or for review of the basics Based on classroom tested materials developed over the course of two decades Companion site for readers, containing animations and MATLAB code downloads Videos and impedance data available from the author's website Presentation slides available for instructor use Sound Propagation is geared towards graduate students and advanced undergraduates in acoustics, audio engineering, and noise control engineering. Practicing engineers and researchers in audio engineering and noise control, or students in engineering and physics disciplines, who want to gain an understanding of sound and vibration concepts, will also find the book to be a helpful resource.
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