Real Madrid are hoping to close the roof at the Santiago Bernabeu to make Manchester City feel like the walls are closing in.
The Spanish giants have asked UEFA for permission to keep the noise in at the redeveloped stadium for the Champions League quarter-final in the hope that it adds to an intimidating atmosphere for the Blues.
The call comes after Real fans held up a banner in their last game calling for everyone to dress in white at the 81,000-capacity ground to create a wall of support.
Real have been stung by the manner of their Champions League mauling at the hands of City in last year's semi-final, where both players and journalists admitted after the game their players had been unable to cope with the hostile noise whipped up at the Etihad as Pep Guardiola's side ran out 4-0 winners in the second leg.
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