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Acoustic and Vibration Characteristic Analysis Technology

This technology is used to evaluate the sound insulation and sound absorption materials used in automobiles and housing and the various kinds of vibration damping materials employed in places such as automobile door panels, which are growing increasingly thin.

Sound Insulation/Sound Absorption Materials

EPT SEALER foam sealing material.

EPT SEALER foam sealing material

The structure of EPT SEALER.

The structure of EPT SEALER

BAFFLITE molded resin pillar filler.

BAFFLITE molded resin pillar filler

Resin foam fillers.

Resin foam fillers

Vibration Damping Materials

LEGETOLEX vibration- damping material.

LEGETOLEX vibration- damping material

An example of the use of LEGETOLEX.

An example of the use of LEGETOLEX

Vibration damping materials.

Vibration damping materials

An example of the use of DOUBLEDAMP 1500 expandable damper sheet.

An example of the use of DOUBLEDAMP 1500 expandable damper sheet

Acoustic Evaluation

With this technology it is possible to clarify the cause of noise, for which countermeasures can then be formulated. It is also possible to pinpoint the exact location where noise is being generated.

Using an acoustic evaluation device and specialized acoustic analysis software it is possible to analyze the sound being emitted from a device with a high degree of accuracy. In addition to noise intensity and frequency characteristics, it is also possible to identify the location where the noise is being generated. Furthermore, when carrying out measurements using an anechoic room, it is possible to measure the smallest noise being emitted from electronic devices without being influenced by ambient noise. Using this type of measurement and analysis it is now possible to pinpoint the cause of noise for which appropriate countermeasures can then be formulated.

Measuring the noise being emitted by an actual device (HDD)

Measuring the noise being emitted by an actual device (HDD).

Measuring acoustic intensity

Measuring acoustic intensity.

Measuring noise within a moving vehicle

Measuring noise within a moving vehicle.

■Measuring noise using a dummy head

Measuring noise using a dummy head.

Recording noise within a vehicle cabin when it is moving or the noise when a door is closed, etc., can be achieved using a dummy head. As the dummy head replicates the acoustic properties of the human head, it is possible to reproduce highly realistic sound. In order to solve noise problems it is important to ascertain how humans hear and by recording noise using a dummy head and using noise quality evaluation methods it is possible to obtain important information that it would otherwise be impossible to obtain using normal noise measuring equipment.

Vibration Evaluation

Non-contact measuring of vibration distribution over a large area from a distance using a laser.

This method uses the Doppler effect of a laser to measure panel vibration without actually touching it, making it possible to measure vibration distribution over a large area within a short period of time, identify areas requiring vibration damping and verify the effectiveness of vibration damping countermeasures. By combining this method with acoustic evaluation it is possible to identify vibration that is the cause of noise and to effectively optimize soundproofing measures using vibration damping.

Vibration evaluation system

Vibration evaluation system.

Vibration measuring points

Vibration measuring points.

Automobile door panel vibration distribution

Automobile door panel vibration distribution.

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