SLVAES8 May 2020 DRV8424 , DRV8424E , DRV8426 , DRV8428 , DRV8428E , DRV8434 , DRV8434E , DRV8434S , DRV8436 , DRV8436E , DRV8889-Q1
The amount of audible noise from a stepper motor depends on the type of motor and the operating conditions. Stepper motor noise has been described as a high-pitched whine, a hissing noise or even a deflating tire. Human audible frequency range is generally considered as 20 Hz to 20 kHz, but the human ear is most sensitive to frequencies between 2 kHz and 15 kHz. Permanent magnet and hybrid stepper motors are generally quieter, whereas variable reluctance stepper motors are the noisiest.
The sources of noise coming out of a stepper motor can be broken into three main categories: magnetic, mechanical, and electrical.