Patent ID: 8582792

Claim:
A method for enhancing the accuracy of sounds heard by a hearing-impaired listener, comprising the following steps: (A) receiving an input sound; (A1) determining a proportion of sound energy of the input sound below 1000 Hz; (A2) determining a proportion of sound energy of the input sound below 6000 Hz; (B) determining if it is necessary to modify the frequency of the input sound according to two criteria, wherein a first criteria is that the proportion of the sound energy below 1000 Hz of the input sound to all sound energy of the input sound is between 0% and 25%; and a second criteria is that the proportion of the sound energy below 6000 Hz of the input sound to all sound energy of the input sound is A %, wherein A is a value between 0 and 80; and (C) modifying the input sound into a modified input sound if both of said two criteria are met, wherein the modified input sound comprises a plurality of sounds at different frequencies, and wherein the proportion of the sound energy below 6000 Hz of the modified input sound to all sound energy of the modified input sound is B %, wherein B is 1.15 to 10,000 times of A.