Most wild animals don't want random interactions with strange noises. They will avoid as much as possible. Grizzlies and black bears don't usually "hunt". I'm unsure how effective it would be with polar bears or if it would draw them in. But your prep for going to an area with polar bears should be not going to the area with polar bears.
Do bears not like bells? Wouldn't it draw them to you (like a dinner bell)?
Most wild animals don't want random interactions with strange noises. They will avoid as much as possible. Grizzlies and black bears don't usually "hunt". I'm unsure how effective it would be with polar bears or if it would draw them in. But your prep for going to an area with polar bears should be not going to the area with polar bears.
Avoid polar bear. Just stay away: https://en.wikipedia.org/wiki/Bear_danger