DIAPHONE
Meaning of DIAPHONE in English
transcription, транскрипция: [ ˈdī-ə-ˌfōn ]
noun
Date: 1906
: a fog signal similar to a siren but producing a blast of two tones
Merriam-Webster's Collegiate English vocabulary.
Энциклопедический словарь английского языка Merriam Webster.
2003