It can be set to
paused even if nothing is currently being spoken through it. If
utterances are then added to the utterance queue, they will not be spoken until the
SpeechSynthesis object is unpaused, using
var amIPaused = speechSynthesisInstance.paused;
var synth = window.speechSynthesis; synth.pause(); var amIPaused = synth.paused; // will return true
|Web Speech API
The definition of 'paused' in that specification.