Turbocharger abnormal noise testing method and device

The invention provides a turbocharger abnormal noise testing method and device, and belongs to the technical field of automobiles. The problem of how to clearly analyze turbocharger abnormal noise is solved. The method comprises the steps that 1, a test sensor is installed; 2, pressure pulsation, near-field noise, interior noise and vibration acceleration inside a turbocharger are acquired; 3, a noise analysis system determines synchronous noise and subsynchronous noise by analyzing the turbocharger impulsive noise frequency according to received acquisition data. A pressure pulsation sensor of the device is arranged on the portion, close to a rear outlet, inside an intercooling pipe of the turbocharger, an interior free field microphone is arranged on the right ear of a driver, a near-field free field microphone is arranged at the near field of the turbocharger, a triaxial acceleration sensor is arranged on a shell of the turbocharger, the test sensor is connected with a noise analysis system through an acqu