Ontology-Based Noise Source Identification and Key Feature Selection: A Case Study on Tractor Cab

Table 1

Classification of degree of correlation.

Correlation coefficient	Degree of correlation
±0.00∼±0.30	Level 1
±0.30∼±0.50	Level 2
±0.50∼±0.80	Level 3
±0.80∼±1.00	Level 4