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Investigating the effects of measured noise source heights on the predicted insertion loss of noise barriers in the new TNM software

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Date Issued:
1997
Summary:
At the present time the Federal Highway Administration is developing a new highway noise prediction model called TNM that is anticipated to be a superior model than its predecessor STAMINA 2.0. TNM will use frequency dependent measured noise source heights as a function of speed, acceleration, pavement type, road grade and vehicle class in its propagation loss and insertion loss calculations. Also, TNM will split the equivalent source height into two sub-sources at specified heights and calculate the insertion loss of noise barriers from these two sub-sources. The accuracy of this concept is investigated in this thesis, and it is found that on the average the two sub-source approach is less accurate than the single equivalent source approximation but will overestimate the attenuated levels, thus a conservative barrier height can be designed from this result.
Title: Investigating the effects of measured noise source heights on the predicted insertion loss of noise barriers in the new TNM software.
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Name(s): Glynn, Charles D.
Florida Atlantic University, Degree grantor
Glegg, Stewart A. L., Thesis advisor
Type of Resource: text
Genre: Electronic Thesis Or Dissertation
Issuance: monographic
Date Issued: 1997
Publisher: Florida Atlantic University
Place of Publication: Boca Raton, Fla.
Physical Form: application/pdf
Extent: 151 p.
Language(s): English
Summary: At the present time the Federal Highway Administration is developing a new highway noise prediction model called TNM that is anticipated to be a superior model than its predecessor STAMINA 2.0. TNM will use frequency dependent measured noise source heights as a function of speed, acceleration, pavement type, road grade and vehicle class in its propagation loss and insertion loss calculations. Also, TNM will split the equivalent source height into two sub-sources at specified heights and calculate the insertion loss of noise barriers from these two sub-sources. The accuracy of this concept is investigated in this thesis, and it is found that on the average the two sub-source approach is less accurate than the single equivalent source approximation but will overestimate the attenuated levels, thus a conservative barrier height can be designed from this result.
Identifier: 9780591382778 (isbn), 15411 (digitool), FADT15411 (IID), fau:12178 (fedora)
Collection: FAU Electronic Theses and Dissertations Collection
Note(s): College of Engineering and Computer Science
Thesis (M.S.)--Florida Atlantic University, 1997.
Subject(s): Traffic noise--Mathematical models
Noise barriers--Mathematical models
Held by: Florida Atlantic University Libraries
Persistent Link to This Record: http://purl.flvc.org/fcla/dt/15411
Sublocation: Digital Library
Use and Reproduction: Copyright © is held by the author, with permission granted to Florida Atlantic University to digitize, archive and distribute this item for non-profit research and educational purposes. Any reuse of this item in excess of fair use or other copyright exemptions requires permission of the copyright holder.
Use and Reproduction: http://rightsstatements.org/vocab/InC/1.0/
Host Institution: FAU
Is Part of Series: Florida Atlantic University Digital Library Collections.