| 摘要 |
The invention relates to a test stand and a method for measuring sound insulation or insertion loss on a test object. The test stand includes a transmitting chamber ( 1 ) provided with a plurality of sound transmitters ( 6 ) and an adjacent receiving chamber ( 2 ), which is separated from the transmitting chamber by a dividing wall ( 3 ) or dividing floor with a test aperture for arranging the test object ( 4 ). The transmitting chamber is provided with a sound transmitter array ( 5 ), which includes at least four sound transmitters ( 6 ), that are arranged in a plane that extends essentially parallel to the dividing wall ( 3 ) or dividing floor. A controlling means is assigned to the sound transmitters ( 6 ), and the sound transmitters are controlled thereby so as to create optionally either a diffuse sound field or an essentially unidimensional sound field directed towards the test object ( 4 ). For measurement with a unidimensional sound field, the sound transmitters ( 6 ) can be controlled so that the sound is incident either perpendicularly or at a specified angle other than perpendicularly on the test object ( 4 ). In this context, the controlling means is preferably configured such that the angle of incidence of the unidimensional sound field on the test object ( 4 ) is adjustable to any value.
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