Abstract
A system for focusing sound around desired locations by using a speaker array of controlled sources is proposed. To increase acoustic signal in certain locations where the user is within but to reduce it in the other certain locations by controlling source signals is the main objective of this study. Based on adaptive time reversal theory, input weighting coefficients for speakers are evaluated for the speaker sources. Experiments and simulations with a speaker array of controlled sources are established in order to observe the distribution of sound field under different boundary and control conditions. The results indicate that based on the current algorithm, the difference of sound pressure level between bright point and dark point can be as high as 12 dB with an eight speakers array system.
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