A Method for Reducing Ground Reflection Effects from Acoustic Measurements PDF Download
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Author: Jere A. Noerager
Publisher:
ISBN:
Category : Absorption of sound
Languages : en
Pages : 78
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Book Description
The method involved placing foam blocks on the ground between sound source and receiver in an approximation of the wedges in an anechoic chamber. The tests were performed out of doors as a function of the receiver height and source-receiver separation distance. The spacing between blocks and the extent of ground covered were varied to estimate the optimum placement and minimum amount of foam treatment needed. Base-line tests without foam were also performed. It was found that the foam treatment reduced the amplitude of the peaks and valleys in the sound pressure spectra substantially. The foam was least effective at low frequency, especially for the low receiver height and for large source-receiver distances. Results from the base-line tests were compared with theoretically predicted results. These base-line test results were in reasonable agreement with those from theory.
Author: Jere A. Noerager
Publisher:
ISBN:
Category : Absorption of sound
Languages : en
Pages : 78
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Book Description
The method involved placing foam blocks on the ground between sound source and receiver in an approximation of the wedges in an anechoic chamber. The tests were performed out of doors as a function of the receiver height and source-receiver separation distance. The spacing between blocks and the extent of ground covered were varied to estimate the optimum placement and minimum amount of foam treatment needed. Base-line tests without foam were also performed. It was found that the foam treatment reduced the amplitude of the peaks and valleys in the sound pressure spectra substantially. The foam was least effective at low frequency, especially for the low receiver height and for large source-receiver distances. Results from the base-line tests were compared with theoretically predicted results. These base-line test results were in reasonable agreement with those from theory.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 540
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Book Description
Author:
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ISBN:
Category : Aeronautics
Languages : en
Pages : 704
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Book Description
Author: Thomas Rossing
Publisher: Springer Science & Business Media
ISBN: 0387304460
Category : Science
Languages : en
Pages : 1179
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Book Description
This is an unparalleled modern handbook reflecting the richly interdisciplinary nature of acoustics edited by an acknowledged master in the field. The handbook reviews the most important areas of the subject, with emphasis on current research. The authors of the various chapters are all experts in their fields. Each chapter is richly illustrated with figures and tables. The latest research and applications are incorporated throughout, including computer recognition and synthesis of speech, physiological acoustics, diagnostic imaging and therapeutic applications and acoustical oceanography. An accompanying CD-ROM contains audio and video files.
Author:
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ISBN:
Category : Astronautics
Languages : en
Pages : 320
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Book Description
Author:
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ISBN:
Category : Atmosphere
Languages : en
Pages : 622
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Book Description
Author: Mats Nilsson
Publisher: CRC Press
ISBN: 148228877X
Category : Science
Languages : en
Pages : 294
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Book Description
Presents Evidence-Based Guidance on Noise Abatement MethodsSolutions for reducing the noise impact of road and rail traffic can be found in the use of natural elements in combination with artificial elements in urban and rural environments. Ground and road surface treatments; trees, forests, and tall vegetation; and the greening of buildings and ot
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ISBN:
Category : Government publications
Languages : en
Pages : 1120
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Book Description
Author:
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ISBN:
Category : Mechanics, Applied
Languages : en
Pages : 620
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Book Description
Author: R J Peters
Publisher: Routledge
ISBN: 1317902998
Category : Technology & Engineering
Languages : en
Pages : 400
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Book Description
Acoustics and Noise Control provides a detailed and comprehensive introduction to the principles and practice of acoustics and noise control. Since the last edition was published in 1996 there have been many changes and additions to standards, laws and regulations, codes of practice relating to noise, and in noise measurement techniques and noise control technology so this new edition has been fully revised and updated throughout. The book assumes no previous knowledge of the subject and requires only a basic knowledge of mathematics and physics. There are worked examples in the text to aid understanding and a range of experiments help students use complicated apparatus. Thoroughly revised to cover the latest changes in standards, codes of practice and legislation, this new edition covers much of the Institute of Acoustics Diploma syllabus and has an increased emphasis on the legal issues relating to noise control.
