This is the 7294th most frequent Chinese word.
耳机
Headphones.
In this sentence, '耳机' refers to headphones that are used for listening to audio, indicating the necessity to replace a broken item.
我的耳机坏了，需要新买一个。
My headphones are broken; I need to buy a new one.
Here, '耳机' refers to headphones as personal audio devices, specifying improper usage in the context of a cinema.
电影院里不要带耳机听音乐，要注意电影内容。
Do not wear headphones to listen to music in the cinema; focus on the movie content.
In this case, '耳机' refers to earphones used for communicative purposes during a phone call.