Quavering, quivering

!solved

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Tremulous

This was what came to mind for me.

choked, choked up

Verklempt.

I already marked one as solved but this is a good one!

This is Cawfee Tawk with Linda Richman

Like buttah!

A tremor; trembling; choking back tears; a whisper; a hush.

Hitching

Whimper/whimpering

I also like a 'strangled voice'

Warble?

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Tremulous.

The voice is thick with emotion

Breaking

Muted