monaural

/mɑˈnɔrəl/
adjective
  1. Relating to or involving the use of only one ear.
    • Some audio recordings are monaural, meaning they are designed to be heard through a single channel.
    • The doctor tested his hearing with a monaural headphone that played sounds into just his left ear.
    • He preferred monaural listening when using a single earbud while jogging.
Synonyms