This thread gets my stamp of approval.
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This thread gets my stamp of approval.
A dog whistle. As in a disciplinary tool pet owners use to train their dogs. It's a whistle that emits a high frequency noise that only animals can hear.
https://youtu.be/iAkttV1xjZQ?t=94
This animation can explain better. ^
In case English is not your first language, words which end in -ty (e.g. stability, tranquility, sovereignty, ability) , usually end with -ties when in plural.