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Sonar and Underwater Acoustics brings together all the concepts necessary for designers and users of sonar systems. Unlike other books on this subject, which are often too specialized, this book is accessible to a wider audience. The first part focuses on the acoustic environment, antenna structures, and electric acoustic interface. The latter provides knowledge required to design, as well as the development and implementation of chain processes for an active sonar from the conditioning input to output processing. The reader will find a comprehensive range of all problems encountered in underwater acoustics for a sonar application, from physical phenomena governing the environment and the corresponding constraints, through to the technical definition of transducers and antennas, and the types of signal processing involved. In one section, measures in underwater acoustics are also proposed.


The All-New Real Estate Foreclosure, Short-Selling, Underwater, Property Auction, Positive Cash Flow Book. Your Ultimate Guide to Making Money in a Crashing Market The All-New Real Estate Foreclosure, Short-Selling, Underwater, Property Auction, Positive Cash Flow Book. Your Ultimate Guide to Making Money in a Crashing Market

Автор: Bill Carey

Год издания: 

Praise for How to Sell Your Home Without a Broker «On a scale of 1 to 10, this book is a 10.» —Robert Bruss Jump into the real estate game—and win big! Home values are crashing and foreclosures are way up. You might think this is a terrible time to get into the real estate market—but you'd be wrong! A crashing real estate market offers plenty of opportunity to profit, if you know how to change your strategy and adjust to the new market reality. In The All-New Real Estate Foreclosure, Short-Selling, Underwater, Property Auction, Positive Cash Flow Book, top real estate investors and authors Chantal and Bill Carey show you how to get in safely and get out profitably. They present four new strategies for taking advantage of today's high foreclosure rate and explain how to invest for the long-term as the market resets to more realistic levels. Novice investors will find plenty of strategies for profiting without risking all they have, and old hands will find new, unconventional techniques that will help them continue to profit even if the market continues to struggle. Inside, you'll learn how to: Combine short-term and long-term investing strategies for cash flow today and tomorrow Buy mortgages in foreclosure at rock-bottom short-sale prices Avoid dealing with lenders by using the seller as your banker Utilize the right type of real estate auction for your investment needs Maximize your cash flow for big profits now and in the future Prepare yourself to profit from rising prices and near-term inflation Whether you're a first-timer or an experienced real estate pro, this is the ultimate guide to getting into the real estate market safely and cheaply—and getting out rich!


How to Sell a House When It's Worth Less Than the Mortgage. Options for How to Sell a House When It's Worth Less Than the Mortgage. Options for "Underwater" Homeowners and Investors

Автор: Dwan Bent-Twyford

Год издания: 

Due to the wave of refinancing in recent years, and the fall in home values, in 2009 about 12 million homeowners and investors will be «underwater»–owing more than their property is worth. This book explains all the options for these homeowners who are trapped with houses they want to get free from, people whose property value has dropped so low that they can't sell the property, people whose mortgage payment has adjusted and now they can't afford the property. In addition to offering advice on subject to's, rentals, leases, loan modifications and more…the book will teach America how to short sale their own home.


Underwater Acoustics. Analysis, Design and Performance of Sonar Underwater Acoustics. Analysis, Design and Performance of Sonar

Автор: Richard Hodges P.

Год издания: 

Offering complete and comprehensive coverage of modern sonar spectrum system analysis, Underwater Acoustics: Analysis, Design and Performance of Sonar provides a state-of-the-art introduction to the subject and has been carefully structured to offer a much-needed update to the classic text by Urick. Expanded to included computational approaches to the topic, this book treads the line between the highly theoretical and mathematical texts and the more populist, non-mathematical books that characterize the existing literature in the field. The author compares and contrasts different techniques for sonar design, analysis and performance prediction and includes key experimental and theoretical results, pointing the reader towards further detail with extensive references. Practitioners in the field of sonar design, analysis and performance prediction as well as graduate students and researchers will appreciate this new reference as an invaluable and timely contribution to the field. Chapters include the sonar equation, radiated, self and ambient noise, active sonar sources, transmission loss, reverberation, transducers, active target strength, statistical detection theory, false alarms, contacts and targets, variability and uncertainty, modelling detections and tactical decision aids, cumulative probability of detection, tracking target motion analysis and localization, and design and evaluation of sonars


Plumbing, Electricity, Acoustics Plumbing, Electricity, Acoustics

Автор: Norbert M. Lechner

Год издания: 

Discover sustainable methods for designing crucial building systems for architects. This indispensable companion to Norbert Lechner's landmark volume Heating, Cooling, Lighting: Sustainable Design Methods for Architects, Third Edition completes the author's mission to cover all topics in the field of sustainable environmental control. It provides knowledge appropriate for the level of complexity needed at the schematic design stage and presents the most up-to-date information available in a concise, logical, accessible manner and arrangement. Although sustainability deals with many issues, those concerning energy and efficiency are the most critical, making an additional goal of this book one of providing architects with the skills and knowledge needed to create buildings that use electricity and water efficiently. Guidelines and rules-of-thumb are provided to help designers make their buildings use less energy, less water, and less of everything else to achieve their primary objectives. In addition, this book: Addresses ways to reduce electricity usage through more efficient lighting systems and appliances and by incorporating automatic switches and control systems that turn off systems not in use. Covers the design of well-planned effluent treatment systems that protect against potential health hazards while also becoming a valuable source of reclaimed water and fertilize.r Provides coverage of fire protection and conveyance systems, including very efficient types of elevators and escalators and designs that encourage the use of stairs or ramps. Complete with case studies that illustrate how these systems are incorporated into large-project plans, Plumbing, Electricity, Acoustics is an indispensable resource for any architect involved in a sustainable design project.


Acoustics of Ducts and Mufflers Acoustics of Ducts and Mufflers

Автор: M. L. Munjal

Год издания: 

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