Abstract :
THE WIDE USE of induction motors in the home, the office, and the factory requires that they both look and sound well. The pleasing, if not handsome, appearance of present-day motors attests to the skill of the “appearance design” experts who have worked with motor engineers in recent years. Now, there is a growing demand that motors should have good “sonance design” also. They should give out a steady pleasing hum, just loud enough to show that they are performing their duties properly, but not loud enough to be noticed.
