The tin ceiling at Heidi's in Minneapolis may be a thing of beauty, but the eatery's owners soon discovered it contributed to high noise levels that had patrons shouting to be heard. Restaurateurs renovating older buildings and serving aging boomers are finding innovative new ways to cope with similar sound problems. "You can hear each other at the table, can barely hear the music in the background and not hear people at other tables, that's the ideal vibe," said veteran restaurateur Richard D'Amico.

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