The electrolarynx is the most widely used device for speaking without vocal cords. However, its use is not very elegant, therefore I built a prototype of an electronic larynx. It's a miniature speaker, invisibly hidden in the mouth. Because the electronic larynx could improve the life of laryngectomy patients, I want it to be further developed by a university. A prototype is available.

Electronic larynx invisibly hidden in the mouth
Electronic larynx invisibly hidden in the mouth

Electronic larynx with wireless control
Electronic larynx with wireless control

The electronic larynx contains a speaker, Bluetooth electronics and a battery. As a result, there are many ways to improve it. The prototype produces only a basic sound, like an electrolarynx. Control is done wirelessly by a smartphone. The device works 30 minutes on a battery, when using more devices, one can quickly exchange in case of an empty battery.

There was a patent on an identical device granted in 1994, which has now expired: https://www.google.com/patents/US5326349. However, this patent has not been exploited. The patent describes the operation of the electronic larynx in detail.

Future improvements

  • The voice of the patient before the laryngectomy can be recorded so that the voice is retained.
  • The intonation and volume can be checked inconspicuously.
  • Dimensions are 28 x 21 x 10mm and may be smaller.
  • The acoustics in the oral cavity can be measured and serve as input for computer controlled voice control.

Do you have any comments? Please let me know.
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