Buchanan was said to slap Davis's knuckles every time he started using heavy vibrato.

Mr. Gniewek's delivery had an endearing bumpiness to it, with thick tone and heavy vibrato.

The sounds are characterized by a very clean output and heavy vibrato, which was customary of the music styles of the time.

Some of the tone was straightened; some luxuriated in heavy vibrato, so better to distinguish one musical line from another.

These darker qualities, plus the heavy vibrato with which they are produced, gave a certain monochromatic tone to her portrayal.

Many veteran singers, as operagoers know, resort to heavy vibrato to disguise technical problems as well to enhance expression.

Stefani avoids the heavy vocal vibrato that she often uses.

Mr. Krosnick's performance was enthusiastic but not very romantic in style: he used a thick, heavy vibrato, and his phrasing was plain.

Even less than elsewhere the soloists' heavy vibrato and occasional portamentos hardly match the idea of a movement inspired at one remove from Bach's supreme example.

The fact remains that the heavy vibrato still common among mainstream performers is largely a product of this century.