Headphones are a pair of small speakers used for listening to audio from a computer , laptop . smartphone , or other such electronic device . People use headphone to privately listen to audio without disturbing anyone in the vicinity . They are plug - and - play devices and do not require any sort of installation before use . Headphones originally consisted of one speaker for each ear , connected by a band over the head . While this style is still in use , modern headphones are also available in a much smaller format that is inserted into the ear , and commonly called earbuds . Modern - day headphones can be whether wireless or wired . Headphones are designed in contrast to loudspeakers that produce sound that can be heard by anyone in the area . First created in 1910 by the U.S. Navy , early headphones were simple and were used as an earpiece device without complicated electronics .1) The text mostly tells about ....
a. the definition of headphones
b. how to use headphones the advantages of using a headphone
c. the differences between headphones and earbuds
d. the general information about headphones

2) We know from the text that headphones ( More than one answer )
a. are only used by the U.S. Navy
b. are smaller than earbuds
c. are used to listen to audio privately
d. are wireless or wired
e. can be connected to laptop or smartphone

3) From the third paragraph , we can infer that the opposite of headphones are ....

4) After reading the text , what is the difference between headphones and earbuds ?

5) What did the early headphones look like ?​