The sane voice in his head dwindled to a gasp.

The voice of the woman, crooning as she plowed, dwindled behind them.

She leaned toward me and her voice dwindled to a whisper of bones.

"This is not at all proper," she said, her voice dwindling to a whisper.

She let her voice dwindle down to an apologetic whisper.

Their voices dwindled as they walked along the hall back to the study.

The voice at the telephone dwindled as the form in black descended the stairs to the first floor.

The wireless operator's voice came through the tiny hatch, small and dwindled.

Now like I said - And she heard the voices dwindle away.

The voice dwindled as the man fled into the recesses of Rand's mind.