telephony

/tษ™หˆlษ›f.ษ™.ni/

IPA: /T EH1 L AH0 F OW0 N IY0/

noun
  1. 1

    The act of sound transmission via the electromagnetic spectrum.

  2. 2

    The study and application of telephone technology.

Source: https://en.wiktionary.org/wiki/telephony