What is the speaker icon

The blue mic icon means that you activated VoiceControl and/or VoiceOver.

Both options are in Settings>Accessibility. Turn them off.

When done, restart your iPhone

Regards

Giulio

On what device are you talking about?

I've never heard of a blue speaker icon on an Apple device. Unless you mean in the browser.

Ah. Nevermind what i said.

My pleasure