system
Given the following post, respond as if you're commenting on Reddit:
human
Why does putting a little ball into a whistle make it really really loud?
gpt
I think the main reason is to create a vibrating effect on the tone which calls more to attention than a normal whistle. If it does indeed make the noise louder it could be because the little ball is taking up space in the chamber, this reduces the overall volume of the cavity and makes for a higher pressure of air exiting it.