MANATEE electromagnetic and vibroacoustic software allows you to synthesize the sound produced by an electrical machine at fixed speed or variable speed (source of electromagnetically-excited noise only, but an additional noise source can be added).

Once the simulation is run the following command launches the sound synthesis:

The quality of the variable-speed sound synthesis process can be improved using these guidelines. The variable speed sound synthesis can be carried either using the variable speed mode (Input.Simu.type_varspeed=2) or using the load extrapolation technique (Input.Simu.type_varspeed=1).

An example of PWM sound at fixed speed generated with MANATEE (asynchronous switching at 4800 Hz) can be listened here:

Sound file synthesized by MANATEE of a PWM-fed squirrel cage induction motor (4800 Hz switching)

A-weighted sound power level spectrum of a traction motor with PWM

An example of an IPMSM run-up under sine supply generated with MANATEE can be listened here:

Variable speed sound synthesis of your electrical machine