1920's Technology Advancements

By airdoggs

  • Lie Detector

    Lie Detector
    The lie detector was invented by John A. Larson in 1921. The lie detector test has been useful in the recruitment process for the FBI.

  • Audiometer

    Audiometer
    Dr. Harvey Fletcher invented the first Audiometer to detect hearing loss. This invention is used in schools to help children with hearing deficiency's get the help they need.

  • Traffic Signal

    Traffic Signal
    Garret Morgan created the traffic signal in 1923. The traffic signal has improved the safety of both pedestrians and motorist.

  • Loudspeaker

    Loudspeaker
    the coil loudspeaker was invented by Chester Rice and Edward Kellogg. This has helped the music industry get the passion of their music out there better as well as bring joy to all music lovers.

  • Television

    Television
    The television was invented by Philo Taylor Farnsworth. The television has influenced everything we do in modern society. We would not have been able to survive the 2020 quarantine without one.