Noise Source Detecting Measurement

Detecting the noise source precisely is the first step to improve noise problem efficiently.
The hemi-anechoic room is in ESTECH Technology Develop Center Sound Laboratory, which is utilized to conduct variety of noise measurement.

The example indicates the interior noise inside of vehicle cabin caused by the noise source outside of the vehicle.
Due to the reciprocity theorem, a speaker is located inside of the vehicle cabin and transmitted noise is measured outside of the vehicle body, which identifies the noise leaks primarily from the circumference of the door.

　 Noise Leakage around 800 Hz 　 　 Noise Leakage around 1000 Hz

　 Noise Leakage around 1250 Hz 　 　 Noise Leakage around 1600 Hz

Example of measurement and analysis system configuration

Software

• PULSE Labshop (Online Real-time Analysis Software)
• PULSE Reflex (Offline Signal Processing Software)

Hardware

• LAN-XI (Measuring Front-End)
• Array Microphone

In addition to conducting test projects, the company proposes and delivers the best fit test hardware and software configuration to satisfy clients demand and requirement.