Method for correcting sound for the hearing-impaired
Patent 7428313 Issued on September 23, 2008. Estimated Expiration Date: 
February 22, 2025. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
February 22, 2025. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesPhonetic equalizer system Patent #: 5233665 InventorAssigneeApplicationNo. 11062368 filed on 02/22/2005US Classes:381/312, HEARING AIDS, ELECTRICAL607/55Promoting auditory functionExaminersPrimary: Briney, III, Walter FAttorney, Agent or FirmInternational ClassH04R 25/00AbstractA method for correcting sound for the hearing impaired includes analyzing an incoming sound into frequency channels and computing a group delay of each of the frequency channels that is expected in a healthy ear. A correction is defined as a percentage less than 100% of the group delay (GD) that a given impaired ear has compared to the group delay of the healthy ear. The amount of delay for the correction as a function of time is computed for each frequency channel, which delay is imposed on each frequency channel. The signal levels are scaled to adjust for audibility, after which the delayed and scaled signals from all frequency channels are combined into an outgoing sound.Other References
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