Patent ID: 7089176
Filing Date: 2006-08-08
Classification: G10K

Abstract:
1. In an end user device, a method for increasing the audio perceptual loudness, the method comprising: shifting at least one frequency of a first audio signal by at least one critical band distance along a critical band scale to create a second audio signal so as to increase the audio perceptual loudness, a power level of the second audio signal being not more than a power level of the first audio signal; generating high-audio perceptual loudness tone alert sequences based on psychoacoustic and audiometric data; generating an audio speaker frequency response curve for a given volume setting and speaker; selecting an equal loudness reference curve corresponding to a lowest frequency response dB level in a 3-dB bandwidth range of the frequency response curve; and creating a loudness sensitivity curve for a given audio speaker response by subtracting the equal loudness reference curve from the audio speaker frequency response curve.