User's voice signal from the helmet vibrations. It works!
For business or technical inquiries about OnlyVoice™:
Vibration sensors can pick up speech signals by detecting tiny vibrations of any surface caused by sound. One example is bone-conducted vibrations triggered by the user’s voice and detected by the sensor mounted in an earpiece. In the video Dr. Alexander Goldin recorded at Knowles Corporation booth at the Global Audio Summit in Shanghai in March 2024, the sensor was mounted in a helmet that picked up the vibrations of his skull during his talk. It worked very well to isolate his voice from low-frequency noise below 700 Hz, but was not effective above that, probably because the thin helmet surface acted like a membrane. To get the best performance, the vibration and microphone signals need to be combined. Alango Technologies has been working on perfecting such sensor fusion technology for several years. We call it OnlyVoice™. Our next step is to test it for helmet applications. Stay informed to follow the progress.