Definition of diaphone in English:


Line breaks: dia|phone
Pronunciation: /ˈdʌɪəfəʊn


A low-pitched fog signal operated by compressed air, characterized by the ‘grunt’ which ends each note.
More example sentences
  • In later years the oscillator was replaced by a duplicate diaphone to be used in the event of breakdown.
  • Use of the diaphones was limited after some lawsuits were filed against the Borough by nearby residents.
  • In 1991 the diaphone fog signal was changed to an electric horn retaining the same character.


early 20th century: from Greek dia 'through' + phōnē 'sound'.

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