The following libraries can be redistributed if you are using the Cognitive
Services Speech SDK for JavaScript, subject to its license:

microsoft.cognitiveservices.speech.sdk.bundle.js
microsoft.cognitiveservices.speech.sdk.bundle-min.js
microsoft-cognitiveservices-speech-sdk NPM library
speech-processor.js

Depending on your usage, you only need to redistribute a subset of the above.