My experience with them is they all make a high pitched buzzing sound due to the frequency they run at. The industrial ones at the higher frequencies and have more transducers the sound is more pronounced.
The industrial ones for medical and dental. If I put my hand in it while its running it wreaks havoc on the air trapped inside my finger joints. It will either pop the knuckle or feel very uncomfortable. You pull your hand out fast.
The industrial ones for medical and dental. If I put my hand in it while its running it wreaks havoc on the air trapped inside my finger joints. It will either pop the knuckle or feel very uncomfortable. You pull your hand out fast.
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