Olive Tree Lab Terrain 2.0 Product Overview

1 2 Product overview Overview : Olive Tree Lab-Terrain® is a noise prediction wave based geometrical acoustics software which simulates and predicts Outdoor Sound Propagation and Noise Barrier efficiency, taking into account geometrical spreading, atmospheric absorption, atmospheric turbulence, ground and objects impedance, spherical wave reflection and diffraction effects of natural or man-made objects in a 3D environment. Olive Tree Lab-Terrain® produces unique sound mapping demonstrating wave interference, calculates Impulse Response and displays Frequency Response results in high frequency resolution, 1/3, 1/1 octave bands and dB(A). The only wave based geometrical acoustics software for Outdoor Sound Propagation with Impulse Response Olive Tree Lab Terrain® is an acoustics software application that can be used for noise barrier design and for noise mapping small to medium scale projects. Olive Tree Lab Terrain® covers the need of acoustic engineers for a noise barriers design tool, acoustic researchers and the academia. The application is focused on two main pillars, accuracy and ease of use. Calculations OTL-Terrain is mainly based on the following methods and their limitation: ? Hadden & Pierce Diffraction 3D model implemented with finite impedances faces using Salomons semi-analytical method including ground effects. Multiple barrier diffraction is calculated in a recursive way at any diffraction order. ? In-house sound path detection methods. ? Ground effect using the One Parameter Theory of Chessell based on Delany and Bazley. ? Reflections from finite surfaces based on Clay–Medwin’s work to include Fresnel zones contribution at any order level. ? Atmospheric absorption based on ISO 9613 -1. ? Turbulence coherence factor based on HARMONOISE WP3 ? Includes ISO 9613-2 calculation methods (equivalent to ANSI S12.62-201x standard, which will soon be adopted in the USA.) ? In this version no atmospheric refraction calculations are included yet. 3 3D mapping of resident BEA Spherical wave reflection, sur-face impedance, 20,000 rays 3D Mapping interpolation Sound Path Explorer (SPE) The Sound Path Explorer, is a module used by OTL-Terrain, an in-house devel-oped algorithm to detect valid diffraction and reflection sound paths from source to receiver in a proper 3D environment. Other than being able to see the contribution of individual sound paths, a new feature is that a user selected individual paths can be calculated, allowing the analysis of their contribution. Sound Propagation Calculation Mediterranean Acoustics Research & Development, has created an acoustical calculation engine, the Olive Tree Lab- Acoustics Lib, which simulates sound propagation in a 3D environment. It utilises the principle of wave based geo-metrical acoustics using sound rays to detect sound paths. Currently a sound ray in OTL-Terrain, carries information on how to lose intensity with distance, how to interact with the atmosphere and how to reflect and diffract when it encounters objects preserving phase information. Eventually our sound ray will acquire sound transmission and refraction properties, thus the acoustical model would be able to analyse phenomena combining outdoor sound propagation, sound transmission and room acoustics at the same time. Impulse Response OTL-Terrain is the only outdoor sound propagation calculation software which calculates Impulse Response in Pa & dB Auralisation Auralise before and after remedial measures. Users can auralise from sound collection or import their own .wav files Noise Sources: ? Multiple Noise Sources ? Noise sources database, flow resistivity, convert to or insert sound absorption coefficient ? Line Source & Point Source ? Sound Power Level in 1/3 Octave Bands - 25 Hz to 10,000 Hz ? Sound Pressure Level 1/3 Octave Bands - 25 Hz to 10,000 Hz Receivers ? Multiple Receivers ? Receiver Noise Criteria Settings-custom from measurements, typical outdoor noise level, PNC, NR Barriers ? Noise barriers of finite size with special properties for the design of remedial measures. Barrier Types - at a click of a mouse transform the same barrier from one type to another, e.g. G to ? barrier type, thin or thick barrier ? Barrier Materials Database, flow resistivity, convert to or insert sound absorp-tion coefficient ? Multiple barrier diffraction is calculated in a recursive way at any diffraction order Import DXF/DWG/IMAGES Show paths between sources and Receivers 3D representation of noise sources 4 Reflections & diffractions: ? Unlimited orders of Reflections ? Unlimited orders of Diffractions ? Maximum ray length 10,000m Equipment requirements ? Windows XP, Windows Vista, Windows 7, Windows Server 2003, Windows Server 2008, Windows Server 2008 R2 (Required) ? .Net Framework 4.0 (Required) ? 100MB hard disk (Required) ? Dual Core or better processor (Recommended) ? Graphics Card with Direct X 10 and above (Recommended) For more information please visit our 2D mapping Precise Graph output window Sound diffraction calculations inside courtyard - path detection Residential Case Study Our Research and Development Vision - Acoustics Software and Beyond Understanding the world is an inbuilt desire of the human species and re-search is what makes us propel towards a better understanding of our envi-ronment and ourselves. A designer acts as a “petite prophet” and once the advice is on paper, events ought to follow the prescribed trajectory More often than not, the outcome deviates from prescription therefore, an accurate prediction of the future ought to be based on the latest scientific findings. We at Mediterranean Acoustics Research & Development study the work of the scientific community, weigh different approaches in tackling a problem and try to develop acoustics software products which can translate academ-ic work into engineering applications. By the use of our noise prediction software we hope to assist acousticians and engineers in predicting sound and noise propagation more accurately, especially in the field of Noise Con-trol. Acoustics has come a long way within the last century, since it was recog-nized as an independent field of study. Computer technology has allowed the dreams of the founders of Acoustics to become reality. Sound and Noise prediction software applications are tools that the acoustical consultant and researcher cannot do without. Mediterranean Acoustics Research & Devel-opment strives to turn vision to reality, theory into practice. PEMARD’s future plans include further research in noise barriers and noise barriers calculations as well as room acoustics, room acoustics software, building acoustics, building acoustics software and noise control. 5 VERSION COMPARISON FEATURE SOLVER ANALYSER Auralisation Only from Sound Collection Allows import & saving of any .wav file Calculation based on ISO 9613-2 Diffraction order 2 Diff. from Barri-ers, 1 Diff. from Walls 100 Diff. from Barriers, 100 Diff. from Walls Reflection order 2 1000 Spherical wave reflection coefficient Finite Impedance with D&B model Finite Imped-ance with D&B model or Bies. Also Infinite Impedance Output window (Calculation Results) 2D & 3D Mapping Auralisation of fixed smples 2D & 3D Map-ping Frequency spectra in High Resolution, 1/3 oct. & 1/1 oct bands Impulse Re-sponse in Pa & dB Auralisation, including user files 3D/2D mapping with isolines on horizontal, vertical and inclined planes, Interpolation, receivers values, export of results in table Precise Graph – Level Before & After insertion of barrier, Noise Criteria, Barrier Insertion Loss, Excess level above noise criteria Indicative Graph – as above for quick and rough analysis 1/3 Octave Calculations results are shown in 1/1 and dB(A) results SOLVER is aimed at Engineers who want to have results without having to worry too much about the detail ANALYSER is aimed at professionals and academics who wish to have detailed analysis results and be able to adjust calculation detail and parameters influence 6 Excess Level Meter in LED bar graph & dB(A) indicator Barrier Types – at a click of a mouse transform the same barrier, from one type to another, e.g. G to ? barrier type Convert Flow Resistivity to Absorption Coefficient PEMARD Calculation Options Limited Unlimited Noise Sources Database Ground Materials Database – flow resistivity, convert to or insert sound abs. coeff. Surface Materials Database – flow resistivity, convert to or insert sound abs. coeff. Barrier Materials Database – flow resistivity, convert to or insert sound abs. coeff. Typical material Absorption Coefficients Database Customise source/noise criteria/materials database Atmospheric absorption Coherent & Incoherent Source contribution Define Path detection settings – number of paths & max. length, order of reflections & diffractions Receiver Noise Criteria – custom from measurements, typi-cal outdoor noise level, PNC, NR Dxf Import Import Images – Google Earth and others with scaling options, allowing to draw with over images in lack of draw-ings Camera Mode: camera at source, camera at receiver and flying camera showing paths and for the adjustment of barrier dimensions for receiver/source occlusion Multiple 3D Model Configurations - allowing variations in a model for results analysis CAD Tools – basic editing tools Measure distance from Point to Point/Object Sample Project (more to download from our website) Isei’s standard configuration for barrier validation perfor-mance Wizard – allowing beginners create a basic 3D model Enabled for Spectrum Analysis Settings - Start, Switch, Stop frequencies in two ranges between of 0,5Hz to 100.000Hz, with a resolution down to 0.001Hz. Ranges can be set for constant frequency step and/or constant per-centage frequency step analysis Impulse Response Sound Path Explorer – detailed analysis of each sound path from Source to Receiver Sound Path Explorer – single path calculation (investigate path contribution) Reflection from finite sized objects using Fresnel zones correction Enabled option, combination of Reflections and Diffractions within a path from Source to Receiver Non Parallel Diffractions on Barrier & Wall edges Atmospheric turbulence Import/Export all calculation results Reports Toggle Dimensions On & Off Dxf Export 7 For more information, demo and prices, please contact your local distributor or PEMARD at info@mediterraneanacoustics.com or info@pemard.com For a distributor in your region, please visit www.otlterrain.com Copyright © 2009-2013 P.E. Mediterranean Acoustics Research & Development Ltd P .O Box 5 1443 , L imas so l 3505 , CYPRUS T : + 357 25 822 8 1 6 , F : + 357 25 822 8 17 E : i n fo@med i t erraneanacous t i c s . com W: ht tp : //www.med i terraneanacous t i c s . com