Sometimes. Users may hear humming, buzzing, or clicking sounds, especially when using high power settings or certain cookware. These sounds are typically normal. The clicking sound is the magnets cycling on and off while they are maintaining the heat setting.
Portable induction hobs have an internal fan to keep them from overheating that will run quite frequently while they are on. When doing UPPCO induction demonstrations, these portable units have also emitted high-pitched tones that we've noticed mostly affects persons in their teen years - other bystanders can't hear it.
