If you go to a page that uses the web SpeechRecognition API, like the demo page for Annyang.js, on the Android Chrome browser, you'll notice that once the mic starts listening for speech input, it will make a notification sound just like the Google Now speech input. And since the speech recognition is activated multiple times to make it seem like it is continuously listening, it gets very annoying.
I'd like to have a kiosk tablet that has a page using Annyang.js, or some other SpeechRecognition API library, to always be listening for commands. However, this notification sound would make it infeasible to leave the volume turned up, and I'd like to be able to play some audio.
Is there a way to disable the audible notification when activating the Speech Recognition API in Android Chrome?
This doesn't have to be on the webpage. I can modify the Android device as needed.