After a couple of weeks he got a call from an authoritative voice.

The deep quiet authoritative voice came to him as if it was coming down from the night sky.

His is an authoritative voice in Washington on national security and campaign finance reform.

A moment later the older scientist's authoritative voice came through.

In 1966, he was already the authoritative voice on the rules and history of the body.

A heavy, authoritative voice came in with much greater volume.

The Association acts as an authoritative voice for the industry at official and government levels.

He was a handsome black man with a deep and authoritative voice.

Although everyone seems to have an opinion, it's not easy to find a clear, authoritative voice.

It is quite clear that as consumers we have a very strong and authoritative voice on this issue.