Institute of Sound and Vibration Research, University of Southampton, University Road, Highfield, Southampton S017 1BJ, United Kingdom.
J Acoust Soc Am. 2010 Jul;128(1):121-31. doi: 10.1121/1.3438479.
There has recently been an increasing interest in the generation of a sound field that is audible in one spatial region and inaudible in an adjacent region. The method proposed here ensures the control of the amplitude and phase of multiple acoustic sources in order to maximize the acoustic energy difference between two adjacent regions while also ensuring that evenly distributed source strengths are used. The performance of the method proposed is evaluated by computer simulations and experiments with real loudspeaker arrays in the shape of a circle and a sphere. The proposed method gives an improvement in the efficiency of radiation into the space in which the sound should be audible, while maintaining the acoustic pressure difference between two acoustic spaces. This is shown to give an improvement of performance compared to the contrast control method previously proposed.
最近，人们对产生一种声场的兴趣日益增加，这种声场在一个空间区域是可听的，而在相邻区域是不可听的。这里提出的方法确保了对多个声源的幅度和相位的控制，以最大化两个相邻区域之间的声能差，同时确保使用均匀分布的源强度。该方法的性能通过计算机模拟和使用圆形和球形的实际扬声器阵列的实验进行评估。所提出的方法提高了在应该可听见声音的空间中辐射的效率，同时保持两个声空间之间的声压差。这被证明比以前提出的对比控制方法有更好的性能。
