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A METHOD OF DETERMINING THE SOUND PRESSURE RESULTING FROM A SURFACE ELEMENT OF A SOUND EMITTING SURFACE
A METHOD OF DETERMINING THE SOUND PRESSURE RESULTING FROM A SURFACE ELEMENT OF A SOUND EMITTING SURFACE
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机译:一种确定从发声表面的表面元素产生的声压的方法
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摘要
A three-dimensional array ( 10 ) of microphones (M) is used to determine the three-dimensional sound field above a surface element (DeltaS) of a sound emitting surface (S), and the air-particle velocity (uSUBn/SUB) at the surface element (DeltaS) is determined using Near-Field Acoustical Holography (NAH). A volume velocity sound source ( 11 ) is used to emit a volume velocity (QSUBv/SUB) in a listening position, and the array ( 10 ) of microphones (M) is used to determine the resulting three-dimensional sound field above the surface element (DeltaS), and using NAH the resulting sound pressure at the surface element (DeltaS) is determined. The acoustic transfer function (H) between the surface element (DeltaS) and the listening position is assumed to be reciprocal and is determined as the ratio of the resulting sound pressure at the surface element (DeltaS) to the volume velocity (QSUBv/SUB). The sound pressure in the listening position resulting from the surface element (DeltaS) is determined as Deltap=H.(uSUBn/SUB. DeltaS).
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机译:麦克风(M)的三维阵列(10)用于确定声音发射表面(S)的表面元素(DeltaS)上方的三维声场以及空气颗粒速度(u 使用近场声全息法(NAH)确定表面元素(DeltaS)处的n SUB>。音量速度声源(11)用于在聆听位置发出音量速度(Q v SUB>),麦克风阵列(10)用于确定最终的三个在表面元素上的三维声场(DeltaS),并使用NAH确定表面元素上的最终声压(DeltaS)。假定表面元素(DeltaS)与聆听位置之间的声学传递函数(H)是互易的,并确定为表面元素(DeltaS)上所得声压与体积速度(Q v SUB>)。由表面元素(DeltaS)产生的收听位置的声压确定为Deltap = H。(u n SUB> .DeltaS)。
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