This product is a device that inspects allophones and vibrations from a production line by using judge method which is resembled with a human being senses.
By performing high-frequency distribution number judging (patent), enabling subtle judging which is difficult to do with FFT, 1/3 octave etc., average value level judgement.

Although former judgement was using a human being senses to detects sounds and vibrations of an engine, this device have the followings features.

• By performing a quantitive judgment, individual difference like human senses are not needed to be worried.
  
• By using PC's measurement, a high-speed, high-accuracy and stabil judgment can be done.
  
• Judgement is performed on the easy-to-see screen using Windows.
  
• Database functions (option) such as a function to study the datas from succeed products statistically to decide the threshold are available..

Generally, sounds analysis method are using 2 dimensions FFT frequency analysis, but since revoluting object's noise such as engines and motors are changing through times, this method is not the same with sense judgment.
That is why a 3 dimensions FFT analysys is needed. But 3 dimensions complicated process of pattern recognition etc., is not suitable for real-time process.
This device performing 3 dimensions process by performing level changes through time high frequency analysis of each frequency band which is analyzed using 2 dimensions FFT frequency analysis has made real-time sense judgment possible.