PD149-CS 960129Pelton Marsh Kinsella
Consuhants in Acoustics, Theatre, Television
and Audio/Visual Design
TO: Terry Mitchell
Carter & Burgess
MEMORANDUM
FROM:
Ted N. Cames, Phd., P.E.
Pelton Marsh Kinsella
DATE:
SUBJECT:
January 29, 1996
Noise Reduction Determination
Alternative Wall Alignment
Vistas of Coppell
At your request, we have analyzed two wall locations for differences in noise levels.
The first wall is a 6 foot masonry wall on a 2 foot tall earth berm located 15 feet south of
the SH 121 right-of-way. The second wall is a 6 foot masonry wall on a 5 foot tall earth
berm located 35 feet south of the SH 121 right-of-way. The receiver was set 16 feet
high (at second story window height) and south of the SH 121 right-of-way fifty feet.
Our study, based on FHWA criteria and 2010 traffic projection, indicated that there is no
difference in noise level for the receiver for either wall location. Generally, noise works
very similar to line-of-sight - if line-of-sight is blocked by a barrier, it will reduce more
noise than one which does not block the line-of-sight.
TNC:vh
7950 Elmbrook Drive, Suite 100 · Dallas, Texas 75247-4951
(800)229-7444 · (214)688-7444 · FAX(214)951-7408
Pelton Marsh Kinsella is a division of Carter & Burgess, Inc.