Casque vs. écouteurs

In the French language, 'casque' and 'écouteurs' are terms that refer to devices used for personal listening. While these words can be confused, they refer to distinct types of listening devices.

Casque

A casque is a pair of headphones that typically covers the entire ear. These are larger than earphones and can come in various styles, including over-ear and on-ear types. They usually provide better sound isolation and are often used in professional settings or for an enhanced listening experience at home.
Il met son casque pour écouter de la musique en travaillant.
(He puts on his headphones to listen to music while working.)
Ce DJ utilise un casque fermé pour mieux entendre sa musique dans la discothèque bruyante.
(This DJ uses closed-back headphones to better hear his music in the noisy nightclub.)

Écouteurs

Écouteurs are earphones that are typically small and portable, designed to fit directly into the ear canal. They are less conspicuous than headphones and are preferred for activities like exercising or commuting due to their compact size.
Il a acheté des écouteurs sans fil pour son téléphone.
(He bought wireless earphones for his phone.)
Elle préfère utiliser des petits écouteurs intra-auriculaires quand elle court.
(She prefers to use small in-ear headphones when running.)

Summary

To sum up, 'casque' refers to headphones which are larger, cover the ears, and tend to provide better audio quality and noise isolation, suitable for professional use or serious listening sessions. On the other hand, 'écouteurs' refers to earphones which are compact, easily portable, and ideal for casual listening or physical activities due to their smaller size and fit into the ear canal. Both 'casque' and 'écouteurs' serve the purpose of personal audio listening but cater to different preferences and situations.