Google Chrome: TTS speeds through passages when tab is muted

**Description**

> What problem are we solving? What does the experience look like today? What are the symptoms? How can one reproduce the problem?

When TTS is active and the tab containing Bookreader is muted (right click tab -> 'Mute site'), the TTS skips over passages rapidly which speeds through the book. When unmuted the current passage will begin reading normally.

**Evidence / Screenshot (if possible)**

> Include evidence of the problem or provide a screenshot.

**Expectation**

> What should be happening? What will it look like / how will it behave when fixed?

TTS will continue progressing at the same rate without audio when tab is muted.

**Context**

> What operating system? What browser type and version?

Windows, Google Chrome 116.0.5845.188 (Official Build) (64-bit)

NOT an issue on Firefox

**Proposal & Constraints**

> What is the proposed solution / implementation? Is there a precedent of this approach succeeding elsewhere?

**Stakeholders**

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