Environment

With the aim of creating a good road environment in harmony with the local area, we are working to solve problems from multiple perspectives by making full use of various measurement technologies to address diverse living environment problems (air pollution, noise, vibration, low frequency sound, water pollution, etc.).
We are also developing diagnostics and inspection technology for road structures using our unique acoustic technology.

We mainly deal with environmental problems directly related to daily life, such as air pollution, noise, vibration, low frequency sound and water pollution, as well as environmental assessments for road projects, backed by our extensive know-how and accumulated technologies.
We also offer a variety of measurements based on our independent technology.

[Environment measurement]
Atmosphere, weather, noise, vibration, low frequency sound, water quality and atmospheric exposure test, etc.

[Measurement inspection]
Environmental assessment, atmosphere, noise, vibration and low frequency sound

[Acoustic measurement]
TSP road sound absorption coefficient measurement, TSP transmission loss measurement, running pass-by sound measurement, model experiments, etc.

[Acoustic analysis]
Level analysis, frequency analysis, TSP analysis, FFT analysis, wavelet analysis, etc.

This is our unique technology that non-destructively measures and evaluates the sound (sound absorption effect) that changes depending on the structure of the paved road surface.
By quantitatively measuring and evaluating the “Sound absorption performance” of pavement, it is an effective method for utilization in roadside noise maintenance management and repair data.
It is also effective as an evaluation of the permeability effect of pavement, and has obtained a high correlation with various tests of prior art, and can be used as an evaluation method of “permeability performance”.

• Grasping the road surface sound absorption performance of various pavements. (New construction, aging)
• Grasping the permeability performance of various pavements. (New construction, aging)
• Understanding the transmission loss of sound insulation walls. (New construction, aging, renewal)
• * Transmission loss measurement for sound insulation walls is a fixed measurement.

<<Patent No. 3802534 “Method and apparatus for measuring sound absorption coefficient of paved road surface”>>

This is our proprietary technology that records the contact sound between the tires and the road surface while driving, and performs diagnostics based on the condition of the pavement and joints from the sound.
It is an effective method for the maintenance and management of roadside noise and identification of noise sources by quantitatively measuring and evaluating the contact noise between the road surface and tires or the impact noise generated from bumps, which is one of the sources of road traffic noise.
In addition, as a new joint inspection method, we are expanding its use as a non-destructive diagnostics for inspection while driving.

• Grasping the road noise value of various pavements. (New construction, aging)
• Grasping of joint level differences. (New construction, aging)
• Joint non-destructive diagnostics. (New construction, aging)

<<Patent pending “Joint inspection system and joint inspection method”>>

• Measurement Certification Business Concentration (Kanagawa Prefecture No. 170), Sound Pressure (Kanagawa Prefecture No. 61), Vibration Acceleration (Kanagawa Prefecture No. 37)

• “Evaluation of low-noise pavement based on tire road noise – consideration” (27th Japan Road Conference Proceedings 2007.11)
• “Traveling measurement technology based on TSP sound absorption coefficient of drainage pavement” (Proceedings of the 28th Japan Road Conference, 2009.10)

• Patent No. 3802534 “Method and apparatus for measuring sound absorption coefficient of paved road surface”
• Patent pending
  “Joint inspection system and joint inspection method”