Patent ID: 6370255
Filing Date: 2002-04-09
Classification: H04R

Abstract:
A method of adjusting loudness of acoustic signals in a sound processing device for the benefit of a hearing-impaired person by processing entirely in the time domain, comprising the steps of:calculating, based upon a sequence of acoustic input signals (x), a control quantity (&PSgr;), representing a subjective loudness perceived by listeners with normal hearing, using said control quantity to control interpolation of precalculated, table-stored, user-specific correcting data, using results of said interpolation as first input signals (m) to a time-dependent digital filter (7), delaying said acoustic input signals (x), feeding the thus-delayed acoustic signals as second input signals (xd) to said time-dependent digital filter (7) and adjusting gain (ge), of an amplifier (9) connected downstream of said digital filter (7) in accordance with a factor specific to said hearing-impaired person.