Applicability of Different Loudness Models to Timevarying Sound of Vehicle

Abstract:

Three sound loudness calculation models,including Zwicker instantaneous loudness model,Moore instantaneous loudness model and Moore timevarying loudness model,and the cited Zwicker timevarying loudness model in ArtemiS,were applied to calculate the timevarying loudness of three typical noises such as steady engine idle noise,impulsive door closing noise and orderswept electric vehicle passby noise.Based on the loudness amplitude and timefrequency loudness results,the applicability of the four loudness models to timevarying sounds was analyzed and compared.It is found that both Zwicker and Moore timevarying loudness models are more reliable than Zwicker and Moore instantaneous loudness models if the sound amplitude and frequency vary tempestuously.And the timefrequency result of Moore instantaneous loudness model can be very helpful to noise source identification and mechanism analysis.