Morse code

US /ˈmɔːrs koʊd/
UK /ˈmɔːrs koʊd/
"Morse code" picture
1.

mã Morse

a telegraphic code in which letters and numbers are represented by strings of dots and dashes (short and long signals)

:
The message was sent using Morse code.
Tin nhắn được gửi bằng mã Morse.
Learning Morse code takes practice.
Học mã Morse cần luyện tập.