Earphone What is it called?
Any modern earphone can, in principle, be considered micro in comparison with the first earphones of the early and mid-20th century. However, even in those years, smaller headphones appeared, which were by no means intended for spies, but for diplomats and which were inserted into the ear to listen to the translation of a speaker's speech, for example, at UN meetings. This headphone was called STETOCLIP.
A stetoclip is what we see in almost every spy action movie, a microphone with an elastic tip. Suitable for covert listening and communication. An excellent technique for passing exams for students.
This is it assembled with the shell:
And this is it without accessories:
Remember: "Note, note. And the professor is a mug."
During the periods of exams and tests, there is a lot of information and advertising about earpieces. It seems to be a useful thing, but not every student will use earpieces, since modern teachers know about such tricks. The correct answer to this question is stetclip.