Headphones haven't hassium !!
Not used for much, but to make headphones you need hassium.
Hassium has not applications.
Hassium is only used for research purposes.
No uses, only for nuclear physics experiments
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It's a built-in microphone that allows the headphones to be used with a telephone to make calls, not just listen to music.
Hassium is an artificial chemical element, radioactive, unstable, metal, solid, atomic number 108, group 8 and period 7 in the periodic table of Mendeleev, similar to osmium, having 12 isotopes, etc. Hassium has not practical uses, it is only for advanced studies.
Every standard set of headphones can be used with any ipod.
Headphones were first used by the military in the late 1920s
Sony MDR-7506 Headphones
Headphones in general are used to hear music when one is in an environment where it is not convenient to play the music out-loud. Isolation headphones are similar except that it is used when the user wishes to have an even better hearing experience as the headphones will cancel out the noise from the outside environment.