CANARINA:
CUSTIC:
Sound barriers
· CUSTIC noise software
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) |
(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) |
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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
Sound barriers · noise barriers
Canarina software solutions:
This application has been used in great number of environmental reports, courses and studies in the last years:United Kingdom: - noise barriers in London - noise barriers in Birmingham - noise barriers in Glasgow
UK: noise barriers in Liverpool - noise barriers in Leeds - noise barriers in Sheffield
UK: noise barriers in Edinburgh - noise barriers in Bristol - noise barriers in Manchester
UK: noise barriers in Leicester - noise barriers in Coventry - noise barriers in Kingston upon Hull
UK: noise barriers in Bradford - noise barriers in Cardiff - noise barriers in Belfast
UK: noise barriers in Stoke-on-Trent - noise barriers in Wolverhampton - noise barriers in Nottingham
UK: noise barriers in Plymouth - noise barriers in Southampton - noise barriers in Reading
UK: noise barriers in Derby - noise barriers in Dudley - noise barriers in Newcastle upon Tyne
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UK: noise barriers in Walsall - noise barriers in Swansea - noise barriers in Bournemouth
UK: noise barriers in Southend-on-Sea - noise barriers in Swindon - noise barriers in Dundee
UK: noise barriers in Huddersfield - noise barriers in Poole - noise barriers in Oxford
UK: noise barriers in Middlesbrough - noise barriers in Blackpool - noise barriers in Bolton
UK: noise barriers in Ipswich - noise barriers in Telford - noise barriers in York - noise barriers in West Bromwich
UK: noise barriers in Peterborough - noise barriers in Stockport - noise barriers in Brighton
UK: noise barriers in Slough - noise barriers in Gloucester - noise barriers in Watford
UK: noise barriers in Rotherham - noise barriers in Newport - noise barriers in Cambridge
UK: noise barriers in Exeter - noise barriers in Eastbourne - noise barriers in Sutton
UK: noise barriers in Coldfield - noise barriers in Blackburn - noise barriers in Colchester
UK: noise barriers in Oldham - noise barriers in St Helens - noise barriers in Crawley
UK: noise barriers in Wyre - noise barriers in Forest - noise barriers in Hertsmere
UK: noise barriers in North East - noise barriers in Derbyshire - noise barriers in Gravesham
UK: noise barriers in Lichfield - noise barriers in West Dorset - noise barriers in Eastbourne
UK: noise barriers in Staffordshire Moorlands - noise barriers in Lewes - noise barriers in Cannock
UK: noise barriers in Chase - noise barriers in Mid Suffolk - noise barriers in Allerdale
UK: noise barriers in Great Yarmouth - noise barriers in Worcester - noise barriers in North Dorset
UK: noise barriers in Blaby - noise barriers in High Peak - noise barriers in Bromsgrove
UK: noise barriers in South Derbyshire - noise barriers in North Devon - noise barriers in Woking
UK: noise barriers in Dartford - noise barriers in Fenland - noise barriers in Rugby
UK: noise barriers in Hartlepool - noise barriers in Spelthorne - noise barriers in South Northamptonshire
UK: noise barriers in Chiltern - noise barriers in North West - noise barriers in Leicestershire Kettering
UK: noise barriers in Hart Broxbourne - noise barriers in Pendle - noise barriers in Castle Point
UK: noise barriers in Rushmoor - noise barriers in West Lindsey - noise barriers in Rother
UK: noise barriers in Lincoln - noise barriers in Three Rivers - noise barriers in Burnley
UK: noise barriers in Hambleton - noise barriers in Babergh Hastings - noise barriers in East Northamptonshire
UK: noise barriers in East Dorset - noise barriers in Cotswold - noise barriers in South Hams
UK: noise barriers in Tandridge - noise barriers in South Holland - noise barriers in Surrey
UK: noise barriers in Heath - noise barriers in Runnymede - noise barriers in Rochford
UK: noise barriers in Harborough - noise barriers in East Cambridgeshire - noise barriers in Selby
UK: noise barriers in Mole Valley - noise barriers in Forest of Dean - noise barriers in Hyndburn
UK: noise barriers in Watford - noise barriers in Stevenage - noise barriers in Gosport
UK: noise barriers in Redditch - noise barriers in Daventry - noise barriers in Tewkesbury
UK: noise barriers in Harlow - noise barriers in Mid Devon - noise barriers in Fylde
UK: noise barriers in Wellingborough - noise barriers in Tamworth - noise barriers in Malvern Hills
UK: noise barriers in Bolsover - noise barriers in Uttlesford - noise barriers in Brentwood
UK: noise barriers in Epsom and Ewell - noise barriers in Barrow-in-Furness
UK: noise barriers in Derbyshire - noise barriers in Dales - noise barriers in Rossendale
UK: noise barriers in Torridge - noise barriers in Weymouth and Portland - noise barriers in South Bucks