Search Results: 'atmospheric noise'

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8 results for "atmospheric noise"
Acoustics By Jean-Louis Migeot
Hardcover: $50.00
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Essential concepts, theory and models of linear acoustics for engineers. This book introduces the basic concepts, theory and models of linear acoustics for engineers. Part one develops the... More > theoretical framework (wave equations, Fourier theory, Helmholtz equation) and introduces key concepts (pressure, velocity, impedance, intensity, power, sound levels). Part two proposes a systematic review of the fundamental physical mechanisms of acoustics and discusses the associated mathematical models: reflection, absorption, resonance, guided propagation, radiation, diffraction, refraction, propagation in dissipative media, convected propagation, atmospheric propagation, fluid-structure interaction, sound transmission and insulation.< Less
Channel Characterisation and System Design for Sub-Surface Communications By David Gibson
Paperback: List Price: $308.09 $77.02 | You Save: 75%
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Based on the author's PhD thesis, this book is a theoretical study of subterranean radio communication, with the focus on methods that depend primarily on the penetration of electromagnetic fields... More > through the ground. Through-the-earth communication using e-m fields - specifically magnetic induction - plays a role in search and rescue systems used in the mining industry. It is also used for borehole telemetry, pipeline location and by cavers and pot-holers. Chapters describe propagation, antennas, and the design of transmitters and receivers. A figure of merit - the specific aperture - is introduced as an aid to antenna design. A crucial aspect of all systems is the signal to noise ratio, for which the strategy of noise-matching is introduced. The design of a wide-band low-frequency sounder is described, for channel evaluation using a non-ideal binary sequence. A method of calculating the inverse of a generalised sequence is described, for which cross-correlation results in a system identification signal.< Less
Channel Characterisation and System Design for Sub-Surface Communications By David Gibson
eBook (PDF): $54.62
Based on the author's PhD thesis, this book is a theoretical study of subterranean radio communication, with the focus on methods that depend primarily on the penetration of electromagnetic fields... More > through the ground. Through-the-earth communication using e-m fields - specifically magnetic induction - plays a role in search and rescue systems used in the mining industry. It is also used for borehole telemetry, pipeline location and by cavers and pot-holers. Chapters describe propagation, antennas, and the design of transmitters and receivers. A figure of merit - the specific aperture - is introduced as an aid to antenna design. A crucial aspect of all systems is the signal to noise ratio, for which the strategy of noise-matching is introduced. The design of a wide-band low-frequency sounder is described, for channel evaluation using a non-ideal binary sequence. A method of calculating the inverse of a generalised sequence is described, for which cross-correlation results in a system identification signal.< Less
SISTEMA DE MONITORIZAÇÃO DE RUÍDO AMBIENTE By Carlos Costa
eBook (PDF): $6.35
(1 Ratings)
The purpose of this work is the development of an electronic system for the noise monitoring, ideal for enviroments like libraries and hospitals, where a work or rest atmosphere is requested, free of... More > this disturbance type.< Less
SISTEMA DE MONITORIZAÇÃO DE RUÍDO AMBIENTE By Carlos Costa
Paperback: $58.81
Prints in 3-5 business days
(1 Ratings)
The purpose of this work is the development of an electronic system for the noise monitoring, ideal for enviroments like libraries and hospitals, where a work or rest atmosphere is requested, free of... More > this disturbance type. < Less
SISTEMA DE MONITORIZAÇÃO DE RUÍDO AMBIENTE (B&W) By Carlos Costa
Paperback: $16.84
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(1 Ratings)
(2º EDITION B&W) The purpose of this work is the development of an electronic system for the noise monitoring, ideal for enviroments like libraries and hospitals, where a work or rest... More > atmosphere is requested, free of this disturbance type.< Less
SISTEMA DE MONITORIZAÇÃO DE RUÍDO AMBIENTE (B&W) By Carlos Costa
eBook (PDF): $4.47
(1 Ratings)
(2º EDITION B&W) The purpose of this work is the development of an electronic system for the noise monitoring, ideal for enviroments like libraries and hospitals, where a work or rest... More > atmosphere is requested, free of this disturbance type.< Less
Black Moon Vol.1 By Alessandro Piras
Paperback: $61.02
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Futuristic architectures, smoky urban atmospheres, neon lights, images from one of the most sophisticated Asian metropolis. The photographer shows the portrait of a labyrinthine city, exotic and... More > mysterious which overnight shows its hidden sides through fascinating play of light and shadows. Each image is accompanied by a back noise, the sound of a metropolis that has temporary slowed his race, the padded sound of a development that seems unstoppable even in the darkness of the night. The fantastic contemporary architecture of Shanghai show the face of a constantly changing megalopolis. The Shanghai's night hide anxieties and hopes of a nation that is going through an important moment in its history. ---- Click the button besides for a low resolution preview. ---- More Info about the Photographer Alessandro Piras at www.pirasphoto.com< Less