| 摘要 |
The loudspeaker protection system has a first frequency band-splitter 102 for splitting an input audio signal Vin into a plurality of audio signals v1, v2...,vn in different respective frequency bands w1, w2...,wn. A first gain block 103 is configured to apply a respective frequency band gain g1, g2...,g3 to each of the audio signals in the different respective frequency bands and a gain controller 107, 108, 109 is provided for controlling the respective band gains. A displacement modeller 104, 105 determines a plurality of displacement signals x1, x2..., xn based on the input audio signal and a displacement model 104a where each displacement signal corresponds to a modelled cone displacement for the loudspeaker for one of said different respective frequency bands. The gain controller controls the respective frequency band gains based on the plurality of displacement signals. The band gains may also be based on modelled loudspeaker power dissipation. |
