Patent Document ID: 5574646
Application ID: 08609944
Patent Flag: 1

Claim One:
1. A gear noise evaluation system comprising; a tachometer for detecting a rotative speed of a shaft on which a gear is mounted; a microphone for detecting a noise from said gear; an FFT analyzer which repeatedly receives as an input the rotative speed from said tachometer and the noise from said microphone and provides as an output a sound pressure value with respect to the rotative speed for a predetermined gear position; a control bench where the rotative speed of the shaft is indicated and changed by an evaluator presetting an absolutely sensual evaluating value as a teacher signal with respect to the rotative speed of the shaft; and, a neuro-computer which receives as an input the sound pressure value from said FFT analyzer, learns to attain the absolutely sensual evaluating value, stops learning when the difference between the sound pressure value and the absolutely sensual evaluating value from said control bench lies in a permissive error range thereby determining a function value.