SOUND SOURCE DETECTION DEVICE, NOISE MODEL GENERATION DEVICE, NOISE REDUCTION DEVICE, SOUND SOURCE DIRECTION ESTIMATION DEVICE, APPROACHING VEHICLE DETECTION DEVICE AND NOISE REDUCTION METHOD

摘要

Disclosed is a noise model generation device that generates a noise model suitable for each environment by determining whether an sound source of a detection target is included in sound information collected by an sound collector with high accuracy. The noise model generation device generates a noise model relating to noise information other than the sound source of the detection target included in the sound information collected by the sound collector, which acquires a power spectrum from the sound information; determines whether the sound source of the detection target is included in the sound information collected by evaluating a probability density distribution (histogram) of the power spectrum; and generates a noise model from the collected sound information when it is determined that the sound source of the detection target is not included in the collected sound information.