Consulting engineering offered by us is based on a capability of executing the total and consistent actions from the survey to the solution implementation, and serves to fix the problem promptly and effectively. Consulting engineering for partial process is also available.
| Investigation/Survey | This activity covers the survey and measurement necessary to identify the phenomena of the problem, to confirm current conditions and status and/or to take base data for the simulation and analysis. Investigation/Survey offered includes noise, infra sound, vibration for environmental impact, machinery vibration, underwater noise, submarine vibration and others. |
| Analysis/Evaluation | Based on the investigation/survey results, this process executes the environmental impact assessment with a prediction of the plant as-built configuration, analysis and evaluations necessary to settle the solution plan, and identify the items necessary to fix. Among them, the plant environmental impact assessment conformity evaluation against regulation figures specified in associated standards/laws infra sound evaluation octave analysis and statistics analysis basis reporting are included. |
| Countermeasure Planning | This process settles the countermeasure to cover regulation requirements related to the environmental impact assessment, and also included are to identify the origin of the cause for resolution and prediction and to implement its countermeasure. This activity is for sillencer , sound attenuation wall, sound attenuation equipment, sound attenuation enclosure , vibration attenuation and others related to environmental protections. |
| Simulation/Analysis | This activity includes performing the simulation to evaluate the environmental impact on areas and locations for which modifications of original plan and/or design changes are applied. Detail cause analysis, confirmation on route and contour for transmission characteristics, calculation for required reduction amount and other issues related to noise and vibration are included in this category. |
| Countermeasure Implementation |
This activity includes the supply and implementation of equipment with countermeasures based on our vast experiences accumulated in various fields. Items included in this category are the supply and installation on silencers, Noise attenuation facility/equipment, vibration attenuation facility/equipment and implementation of sound and vibration attenuation measures. |
| Verification | This activity verifies, through various measurements, issuance of verification report and certificate for conformance, whether the countermeasure implemented covers predicted and calculated characteristics and figures which correspond to those specified in regulation requirements related to the environmental impact assessment. |
Two samples of consulting engineering activities with the total and consistent actions from the survey to the solution verification are presented below to introduce our activities. One is for total power plant noise analysis and the other is for the large sound-attenuation barrier walls for aircraft engine test purpose at the airport.
Power Plant Noise Attenuation
Typical Power Plant
| Step 1 | Step 2 | Step 3 | ||
| To make the total plant analytical model with reflections of profiles for building, major structures, major equipment and geographical features, and to perform the noise characteristic calculation and prediction. |
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Based on the calculation results, the level contour map for infra sound, noise and vibration in the total plant and areas adjacent to the plant is prepared. For this calculation and prediction, individual noise source location and noise characteristics are reflected for the analytical model. |
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Items for which sound- and vibration-attenuation measures are applied are identified, and a calculation to settle the further noise- and vibration attenuation degrees is carried out. Key issue on this step is to settle the best solution by evaluating its effectiveness, cost, functions and others related to total efficiencies. |
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Calculation Model
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Calcuration Result
Before Improvement
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Calcuration Result
After Improvement
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Large Sound-Attenuation Barrier Walls for Aircraft Engine Operational Test
Large sound-attenuation barrier walls introduced below is for aircraft engine operation test at the airport. Before fixing the barrier wall design, performance prediction and evaluation related to aero-dynamic and acoustic characteristics are carried out by using the scaled model and the suitable and best wall configuration and dimensions are selected.
 SOUND BARRIER WALLS |
 AERODYNAMIC & ACCOUSTIC ANALYTICAL MODEL |
