noun
Primarily refers to protective earmuffs worn in noisy environments, rather than fashion or cold-weather earmuffs.
工事現場ではイヤーマフを着用してください。
Please wear earmuffs at the construction site.
耳栓 are earplugs inserted into the ear canal, while イヤーマフ are cup-style earmuffs worn over the ears.
Loanword from English 'earmuffs'.