✦ LIBER ✦

Attenuation of traffic noise indices Leq and LN

✍ Scribed by J.G. Wegner; C.G. Don

Publisher: Elsevier Science
Year: 1981
Tongue: English
Weight: 414 KB
Volume: 14
Category: Article
ISSN: 0003-682X
DOI: 10.1016/0003-682x(81)90016-5

No coin nor oath required. For personal study only.

✦ Synopsis

Analysis of the attenuation of Leq and L N values with distance over grassland from a line of moving traffic indicates that the noise sources effectively radiate energy in the horizontal plane with a distance term different from the commonly assumed inverse square law. This requires an adjustment to the angular corrections for partial screening which now become dependent on the noise index being measured. The attentuation of traffic noise by a wooden fence structure around a suburban house has also been investigated. Shielding effects caused by various components were isolated as the fence structure was sequentially demolished. The shape of the sound field behind the finite length of front fence was deduced, for the various L N values, by using the amended angular corrections.

📜 SIMILAR VOLUMES

Barrier attenuation of traffic noise

✍ Rufin Makarewicz; Jan Jarzȩcki 📂 Article 📅 1991 🏛 Elsevier Science 🌐 English ⚖ 322 KB

Traffic noise—The performance and econom

Traffic noise—The performance and economics of noise reducing materials

✍ R.J. Thomas 📂 Article 📅 1969 🏛 Elsevier Science 🌐 English ⚖ 272 KB

Traffic noise attenuation in an urban ar

Traffic noise attenuation in an urban area in terms of A-weighted sound exposure level

✍ Rufin Makarewicz; Ingrid Krasnowska 📂 Article 📅 1992 🏛 Elsevier Science 🌐 English ⚖ 310 KB

This paper presents a method for calculating the A-weighted sound exposure level of noise generated during passage of a single vehicle. The excess attenuation of an urban area is taken into account. The Ground Area Index is used for urban area description. The results can be used for the approximati

Road Traffic Noise Annoyance in Relation

Road Traffic Noise Annoyance in Relation to Average Noise Level, Number of Events and Maximum Noise Level

✍ T. Sato; T. Yano; M. Björkman; R. Rylander 📂 Article 📅 1999 🏛 Elsevier Science 🌐 English ⚖ 122 KB

The extent of annoyance caused by road trac noise was investigated in 15 areas with a varying number of vehicles and dierent distances between the trac and houses. The goal was to compare two principles for expressing noise exposure. One was based on the conventional energy equivalent value in terms

Contrast-to-noise ratios of diffusion an

Contrast-to-noise ratios of diffusion anisotropy indices

✍ Peter B. Kingsley; W. Gordon Monahan 📂 Article 📅 2005 🏛 John Wiley and Sons 🌐 English ⚖ 211 KB

## Abstract The degree of diffusion anisotropy in different brain regions is usually measured by a diffusion anisotropy index (DAI) such as relative anisotropy (RA) and fractional anisotropy (FA). FA has been reported to have a higher contrast‐to‐noise ratio (CNR) than RA. The present work compares

ROAD TRAFFIC NOISE IN NIGERIA: MEASUREME

ROAD TRAFFIC NOISE IN NIGERIA: MEASUREMENTS, ANALYSIS AND EVALUATION OF NUISANCE

✍ M.U. ONUU 📂 Article 📅 2000 🏛 Elsevier Science 🌐 English ⚖ 233 KB

The investigation comprised "eld measurements of road tra$c noise at over 60 sites in 8 cities in South-Eastern Nigeria and psychological survey, by questionnaires, of respondents living and working close to the sites. Instantaneous and 24 h noise measurements were made at the noisiest points, near