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Abstract

In some embodiments, a method and a system for controlling distortion of the output of a miniature speaker by attenuating critical frequency band of the input signal to be reproduced, using tuning parameters that have been predetermined where the critical frequency band is a frequency range of the speaker's frequency response in which Total Harmonic Distortion (THD) peaks. The distortion control is performed in a manner which allows an increase in the average loudness of the speaker's output without significantly increasing distortion. The tuning parameters include a center frequency and a bandwidth of the critical frequency band, and a power threshold value. In some embodiments, the system is a loudness maximizer configured to limit distortion of a speaker's output by limiting distortion in a critical frequency band using predetermined control parameters, and limit the dynamic range of the output signal and increase its perceived overall average loudness level.


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Document History
  • Publication: May 1, 2013
  • Application: Aug 11, 2011
    CN CN 201180039610 A
  • Priority: Aug 11, 2011
    US US 2011/0047333 W
  • Priority: Aug 18, 2010
    US US 40174610 P

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