Two-tone

Two-tone, two tone, or 2 tone, etc., may refer to:

Audio and sound

  • Two-tone analysis, in nonlinear system measurement
  • Two-tone attention signal
  • Two-tone chime, such as the "ding dong" sound of a doorbell
  • Two-tone sequential paging, selective calling method in analog 2-way radio transmission
  • Two-tone siren, a European type of siren

Language

Music

Other

See also

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