The phrase "audience concentrate" is not correct in standard written English.
It seems to be an incomplete expression and lacks clarity in meaning.
Example: "To ensure the success of the presentation, it is crucial for the audience to concentrate on the key points being discussed."
Alternatives: "audience focus" or "audience attention".
On one hand, the performer projects a sequence of activity upon which the audience concentrates intensely.
Silvo's audience, concentrated in Western Europe and Scandinavia, did not care and stayed true to the end.
In any case, during the 1960s the serious film audience (concentrated for the most part in the larger cities and on college campuses) took the key Europeans seriously and tended to dismiss Hollywood movies when they weren't slumming at them.
They wonder why it took Fifa, an immovable deadline and a worldwide audience to concentrate minds.
Many of the arrangements seemed purposely bland, as if to force the audience to concentrate on melody and lyric.
Few audience members concentrate on the guy onstage with computers and mixers; they're watching one another or dancing themselves silly, the more the merrier.
This makes for a plot that unfolds obliquely, in language that is occasionally ponderous, a bit unnatural for speakers, and it certainly requires an audience to concentrate.
And she discovered that performing in Yiddish, when Jewishness is simply taken for granted, can liberate an artist and audience to concentrate on a play's essential humanity.
We have at all times revelled in the artificiality of theatre, in the fact that it is a game of make-believe which can persuade an audience to concentrate with the complete absorption of children at play.
You might expect that the executives at Columbia Pictures, seeking a new audience, would concentrate on the millions of kids who, being too young to have seen the original film, have no fond and squishy memories to cling to.
