I carried one of the faux Bison design cylinder whistles on a keychain for a while. It now belongs to DW after a bought of laryngitis.

Can the single, steady tone be recognized over the background noise? The lack or a chord or trill was the one thing that kept me away the the single tube whistles.
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Hope for the best and prepare for the worst.

The object in life is not to be on the side of the majority, but to escape finding oneself in the ranks of the insane