The gear whine sound of an axle system is one of the most important sound qualities in a sport utility vehicle (SUV). Previous work has shown that, because of masking effects, it is difficult to evaluate the gear whine sound objectively by using only the A-weighted sound pressure level. In this paper, a new objective evaluation method for this sound was developed by using new sound metrics, which are developed based on the increment of signal to noise ration and the psychoacoustic parameters in the paper, and the artificial neural network (ANN) used for the modeling of the correlation between objective and subjective evaluation. This model developed by using ANN was applied to the objective evaluation of the axle-gear whine sound for real SUVs and the output of the model was compared with subjective evaluation. The results indicate a good correlation of over 90 percent between the subjective and objective evaluations.
The objective of this research is investigating the mediating effect of job engagement on the relationship between job autonomy and innovative behavior in public organizations. Major findings from Structural Equation Model analysis demonstrates that the variable 'job engagement' took a positive role between job autonomy and innovative behavior. From theoretical point, this result provides the empirical evidence of causal relationship in the three components of attitude-cognition, emotion, and action, which contributes to the advancement of action theory. Some policy implications can be drawn from the empirical findings. Firstly, job autonomy need to be seriously considered as a strategic instrument for the encouragement of innovative behavior. Secondly, job engagement of employees need to be more carefully monitored to stimulate the innovative behavior in the public organizations. In public organizations, enhancement of innovative behavior can not be achieved from institutional arrangements. Provision of job autonomy is more effective method of behavior change than performance management approach.■ keyword :|Innovative Behavior|Duty Autonomy|Job Engagement|
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