CANARINA:

Home

Testimonials

Contact us

DEMOS

About us

Press

World

Clients

FAQ

Brochure

Price

 

CUSTIC:

CUSTIC

Solutions

Advantages

Order and price

Algorithms I

Algorithms II

Input data I

Input data II

Input data III

Commands

Average    

Import

Models and GIS

Barriers

Google maps

3D and 2D

 

 

 

 

 

Sound barriers · CUSTIC noise software

                                 

Applications 2: aircraft noise · active noise control · noise assessment · train noise · noise consultants · noise maps · 3D and 2D

 

Barriers:

With this command, you can draw barriers on the computer screen. The barrier can be eliminated through the ELIMINATE command (used also to eliminate sources).

 

The software calculates the shadow regions and it applies attenuations values in that places. The buildings can be also considered as sound barriers.

 

(1) Noise source

(2) No transmission loss

(3) Barrier

(4) Shadow region

(5) Direct path

(6) Difraction

 

(Material)

(Thickness)
mm

(Surface Density) kg/m2

(Transmission Loss), dB (A)

(Polycarbonate)

8-12

10-14

30-33

(Acrylic -Poly-Methyl-Meta- Acrylate (PMMA)-)

15

18

32

(Concrete Block 200x200x400 light weight)

200

151

34

(Dense concrete)

100

244

40

(Light concrete)

150

244

39

(Light concrete)

100

161

36

(Brick)

150

288

40

(Steel), 18 ga

1.27

9.8

25

(Steel), 20 ga

0.95

7.3

22

(Steel), 22 ga

0.79

6.1

20

(Steel), 24 ga

0.64

4.9

18

(Aluminium Sheet)

1.59

4.4

23

(Aluminium Sheet)

3.18

8.8

25

(Aluminium Sheet)

6.35

17.1

27

(Wood)

25

18

21

(Plywood)

13

8.3

20

(Plywood)

25

16.1

23

(Absorptive panels with polyester film backed by metal sheet)

50-125

20-30

30-47

(* Values assuming no openings or gaps in the barriers)

 

The calculation result is better if you introduce more than one barrier.

Example:

One barrier:


Several barriers:

 

For more than 4 barriers, the calculation converges. We use the same model as London and Hong Kong.

An important point is that the topographic line command doen’t consider sound reflections. You need to pay attention if you use both commands (topographic lines and barriers) at the same time.

 

References:

6.1 The Highways Agency (1994) Design Manual for Roads and Bridges, Volume 10, Environmental Design, Section 5, Environmental Barriers, Part 1, Design Guide for Environmental Barriers, HMSO, London.

6.2 The Highways Agency (1995) Design Manual for Roads and Bridges, Volume 10, Environmental Design, Section 5, Environmental Barriers, Part 2, Environmental Barriers: Technical Requirements, HMSO, London.

6.3 The Highways Agency (1994) Manual of Contract Documents for Highway Works Volume 1 Specification for Highway Works Series 2500 Special Structures

6.4 U.S. Department of Transportation Federal Highway Administration (1976) A Guide to Visual Quality in Noise Barrier Design. California Department of Transportation (1997) Technical Noise Supplement 1st Draft

6.6 Benz Kotzen and Colin English (1998) Environmental Noise Barriers: A Guide to their Acoustic and Visual Design,E & FN Spon, London

6.7 David C Hothersall and Richard J Salter (1977) Transport and the Environment, Crosby Lockwood Staples, London

6.8 Ian Sharland (1986) Woods Practical Guide to Noise Control, Woods of Colchester Limited

6.9 Environmental Protection Department, Application of Screening Structure to Abate Noise from Surface Transportation, Environmental Protection Department, Hong Kong

6.10 Environmental Protection Department (2000) Housing Design to Abate Traffic Noise in Hong Kong, Environmental Protection Department, Hong Kong

6.11 Environmental Protection Department (2001) Screening Structures and Building Designs against Transportation Noise in Hong Kong, Environmental Protection Department, Hong Kong

6.12 Hong Kong Government (1991) Environmental Guidelines for Planning in Hong Kong, an Extract from the Hong Kong Planning Standards & Guidelines

6.13 Hong Kong Government (1997) Environmental Impact Assessment Ordinance

6.14 Hong Kong Government (1997) Technical Memorandum on Environmental Impact Assessment Process

6.15 Highways Department (2001) Particular Specification for Noise Barriers, Highways Department, Hong Kong

6.16 Highways Department (2002) Final Report of the Noise Enclosure Lighting - Engineering Study, Highways Department, Hong Kong

 

 

          (air)                (water)          (electrosmog)     

 

 

 

Sound barriers · noise barriers

 

                                                                               

Canarina Environmental Software

Software for environmental consulting firms

Canary Islands, Spain 

e-mail: contact

 

 

  

European Union · network on Pollution

Member of MAPO: European network on Marine Pollution.

       Flag of Portugal 

 

  english:     

 

 castellano:        italiano:       

 

 français:      português:  

 

deutsch:

 

  APPLICATIONS castellano: DIS CUS DES  RAD   english: DIS DES RAD  

 

deutsch: DIS CUS  DES  RAD   português: DIS CUS DES RAD  

 

italiano:   DIS CUS  DES RAD français:  DIS CUS DES RAD