Patent ID: 9083298
Filing Date: 2015-07-14
Classification: H03G,H04R

Abstract:
1. A method for audio presentation by a playback device, the method comprising: determining a first fixed threshold for a first frequency band; determining a first level of an audio signal within the first frequency, the first level being less than the first fixed threshold; determining a second level of the audio signal for a second frequency band, the second frequency band differing from the first frequency band; determining a third level of the audio signal for a third frequency band, the third frequency band differing from the first and second frequency bands; determining a second fixed threshold for the second frequency band; determining a third fixed threshold for the third frequency band; computing, by a processor of the playback device, a time-varying threshold for the first frequency band using the second level and the second fixed threshold, without contribution of the third level and the third fixed threshold, wherein the time-varying threshold is less than or equal to the first fixed threshold; attenuating the audio signal within the first frequency band based upon the time-varying threshold; and audibly presenting the attenuated audio signal by at least one output transducer of the playback device.