Method of adjusting filter parameters and an associated...

Details Method of adjusting filter parameters and an associated... Method of adjusting filter parameters and an associated...

2003-06-06

2008-08-05

Chin, Vivian (Department: 2615)

Electrical audio signal processing systems and devices

Including frequency control

C381S099000, C381S100000, C381S103000, C381S102000, C381S104000, C381S056000, C381S086000, C381S058000

Reexamination Certificate

active

07409066

ABSTRACT:
To improve upon a method of adjusting at least one filter parameter such as the mid-frequency of at least one filter unit provided with a playback system for audio signals, this filter unit being provided in particular for at least one digital equalizer assigned to the playback system, as well as an associated playback system so as to achieve automatic optimization of an acoustically correct bass level boosting,[a] first the acoustic frequency response is determined,[b] then a cutoff frequency below which the sound pressure falls below a sound pressure threshold level based on the average sound pressure is determined, and[c] next the filter parameter(s) of the filter unit is/are adjusted automatically, so that the mid-frequency of the filter unit is just above the cutoff frequency thus determined.

REFERENCES:
patent: 4596902 (1986-06-01), Gilman
patent: 5995817 (1999-11-01), Lubbe et al.
patent: 6885752 (2005-04-01), Chabries et al.
patent: 7016509 (2006-03-01), Bharitkar et al.
patent: 100 27 618 (2001-01-01), None
patent: 0 451 620 (1991-10-01), None
patent: 2 478 409 (1982-09-01), None

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