Loudspeaker overload protection

摘要

A loudspeaker overload protection circuit an method for protecting a loudspeaker that is connected to a signal source are disclosed which comprise: receiving at a compressor a signal representing the estimated loudspeaker power consumption; receiving at the compressor a signal representing the nominal power of the loudspeaker; receiving at the compressor an input audio signal from the signal source and supplying with the compressor an output audio signal to the loudspeaker; estimating from the output audio signal, (a) signal(s) that represent(s) the voltage and/or current supplied to the loudspeaker and a parameter that represents the ohmic of the loudspeaker the power consumed by the loudspeaker; supplying a signal representing the estimated loudspeaker power consumption to the compressor; and attenuating with the compressor the input audio signal when the signal representing the estimated loudspeaker power consumption exceeds the signal representing the nominal power of the loudspeaker.