1. First of all, red headphones are headwear and do not need to be displayed while listening to music. Instead, they need to be put on in the wardrobe after redemption and actively put on before they are displayed. The item type of the white earphones displayed by Duolingo is different from the red earphones.
2. The display of headwear such as red headphones has nothing to do with whether you are listening to music backstage. It is displayed when you put it on, and it falls off when you take it off. It is used in the same way as a cloak. Therefore, some people also call them red earmuffs, because they do not have the function of earphones and cannot listen to music. They are just earmuffs and headgear.
3. In short, the red headphones are not the white headphones that pop up when music is playing in the background. The former is a limited headwear that can be exchanged for candles, and the latter is a free functional detail prop.