The woman in the photo is wearing an electronic ankle bracelet on her ankle; a form of electronic tagging that is often used for people right after they are released from prison. In the USA, ankle bracelets such as this one usually have a GPS system built in. Human ankles are also used monitor DUI (driving under the influence of alcohol or drugs) offenders and abusive parents because of alcohol consumption. These bracelets are also attached to ankles, and read the blood alcohol content of the person wearing it every 30 minutes, reporting every half hour to supervising agencies. We don’t think too much about our ankles unless we break one or sprain or twist one, but law enforcers love ankles.
The pronunciation of the word uncle is softer than ankle. You probably already know that an uncle is a brother of your mother or father; in other words, the husband of an aunt. Uncle Sam, whose image accompanies the audio, is a personification of the American government. We have an interesting idiom in American English: “Say uncle!” That is the imperative command your opponent shouts when he wants you to give up or surrender. Picture a bully that you tried to stand up to, but now you find yourself lying on the ground and he is sitting on top of you. If he is a typical American bully, he will demand that you say “uncle” (maybe more than once) thus admitting submission. And you will say “Uncle”, as many times as he demands, admitting that you have given up, which is the best way to be done with a bad situation.