System and method for personalization of an audio equalizer
First Claim
1. A method for automatically generating a personalized equalization filter for listener, the method comprising:
- measuring a first hearing profile of the listener as a deviation of a first recorded response profile, obtained from a first equal loudness hearing test when the listener is listening through a personal listening device in a personal listening environment, from a first reference equal-loudness contour associated with a first given phon level;
automatically generating a first personalized equalization filter based on the measured deviation of the first hearing profile such that application of the personalized equalization filter to an audio signal played through the personal listening device provides an equalized listening profile that recovers the equal-loudness contour for which the hearing profile was measured;
applying the first personalized equalization filter to an audio signal played through the personal listening device; and
automatically adapting the personalized equalization filter to a new phon level that differs from the phon level for which the listener'"'"'s hearing profile was measured so that the personalized equalization filter automatically adapts to match an equal-loudness contour of the new phon level,wherein automatically adapting the personalized equalization filter to a new phon level that differs from the phon level for which the listener'"'"'s hearing profile was measured comprises;
automatically adapting the personalized equalization filter based on a second recorded response profile and a second reference equal-loudness contour associated with a second given phon level,wherein automatically adapting the personalized equalization filter based on the second recorded response profile and the second reference equal-loudness contour associated with the second given phon level comprises;
measuring a second hearing profile of the listener as a deviation of the second recorded response profile from the second reference equal-loudness contour;
automatically generating a second personalized equalization filter based on the measured deviation of the first hearing profile; and
generating a third personalized equalization filter by deriving coefficients for the third personalized equalization filter based on coefficients for the first and second personalized equalization filters.
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Accused Products
Abstract
The invention is directed to synthesizing a personalized audio equalization filter based on an individual'"'"'s hearing profile when listening to audio signals using a preferred electronic means of transduction and production of the audio signals through headphones, earphones, or loudspeakers and is presented in two steps. In the first step, the deviation of the listener'"'"'s hearing profile, when the preferred listening device is donned, is measured and recorded relative to predetermined equal-loudness contours (e.g., ISO standard equal-loudness contours). The hearing profile is used to compute an equalization filter such that when the audio signal to be reproduced is played through the filter, the equal-loudness contour for a specified phon level is restored. Thus, the invention compensates for deviations of the user'"'"'s listening device, the user'"'"'s own hearing profile from a standard hearing profile that represents natural hearing, and other factors. The equalization filter can be adapted to any phon level through adaptation of filter coefficients as a function of the volume of the listening level.
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Citations
22 Claims
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1. A method for automatically generating a personalized equalization filter for listener, the method comprising:
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measuring a first hearing profile of the listener as a deviation of a first recorded response profile, obtained from a first equal loudness hearing test when the listener is listening through a personal listening device in a personal listening environment, from a first reference equal-loudness contour associated with a first given phon level; automatically generating a first personalized equalization filter based on the measured deviation of the first hearing profile such that application of the personalized equalization filter to an audio signal played through the personal listening device provides an equalized listening profile that recovers the equal-loudness contour for which the hearing profile was measured; applying the first personalized equalization filter to an audio signal played through the personal listening device; and automatically adapting the personalized equalization filter to a new phon level that differs from the phon level for which the listener'"'"'s hearing profile was measured so that the personalized equalization filter automatically adapts to match an equal-loudness contour of the new phon level, wherein automatically adapting the personalized equalization filter to a new phon level that differs from the phon level for which the listener'"'"'s hearing profile was measured comprises; automatically adapting the personalized equalization filter based on a second recorded response profile and a second reference equal-loudness contour associated with a second given phon level, wherein automatically adapting the personalized equalization filter based on the second recorded response profile and the second reference equal-loudness contour associated with the second given phon level comprises; measuring a second hearing profile of the listener as a deviation of the second recorded response profile from the second reference equal-loudness contour; automatically generating a second personalized equalization filter based on the measured deviation of the first hearing profile; and generating a third personalized equalization filter by deriving coefficients for the third personalized equalization filter based on coefficients for the first and second personalized equalization filters. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. Apparatus for automatically generating a personalized equalization filter for a listener, the apparatus comprising:
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a hearing test module configured to produce a first recorded response profile from a first equal loudness hearing test when the listener is listening through a personal listening device in a personal listening environment; and an adaptive equalization filter module configured to measure a first hearing profile of the listener as a deviation of the first recorded response profile from a first reference equal-loudness contour associated with a first given phon level, automatically generate a first personalized equalization filter based on the measured deviation of the first hearing profile such that application of the personalized equalization filter to an audio signal played through the personal listening device provides an equalized listening profile that recovers the equal-loudness contour for which the hearing profile was measured, and apply the first personalized equalization filter to an audio signal played through the personal listening device, wherein the adaptive equalization filter module is further configured to automatically adapt the personalized equalization filter to a new phon level that differs from the phon level for which the listener'"'"'s hearing profile was measured so that the personalized equalization filter automatically adapts to match an equal-loudness contour of the new phon level, wherein the adaptive equalization filter module is configured to automatically adapt the personalized equalization filter based on a second recorded response profile and a second reference equal-loudness contour associated with a second given phon level, and wherein the adaptive equalization filter module is configured to measure a second hearing profile of the listener as a deviation of the second recorded response profile from the second reference equal-loudness contour, automatically generate a second personalized equalization filter based on the measured deviation of the first hearing profile, and generate a third personalized equalization filter by deriving coefficients for the third personalized equalization filter based on coefficients for the first and second personalized equalization filters. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification