1. Listen to it. This is the most obvious way to tell if a motor is noisy. If you can hear the motor running, even from a distance, it's likely that it's noisy.
2. Feel it. If you can feel the motor vibrating, it's likely that it's noisy. This is because the vibrations are caused by the motor's moving parts.
3. Measure the sound level. You can use a sound level meter to measure the sound level of the motor. This will give you a more objective measurement of the noise.
If you confirm that a motor is noisy, there are a few things you can do to reduce the noise:
* Lubricate the motor. This will help to reduce the friction between the motor's moving parts.
* Replace the bearings. If the motor's bearings are worn out, they can cause the motor to vibrate.
* Install soundproofing material. This will help to absorb the sound of the motor.
* Move the motor to a different location. If possible, move the motor to a location where it won't be as disruptive.
By following these tips, you can reduce the noise of a noisy motor and make it more comfortable to work with.
