| 摘要 |
An apparatus comprising:
a floor covering having an upper surface, a lower surface, an edge, and an interior volume enclosed by the upper and lower surfaces and edge, the upper and lower surfaces covering an area of at least 0.5 m 2 and separated by a distance of less than 40 mm;
an electro-acoustic transducer mounted in one of the upper or lower surface and having a first radiating surface coupled to the interior volume. |
