Electrical audio signal processing systems and devices – Including frequency control
Patent
1986-06-26
1989-07-04
Isen, Forester W.
Electrical audio signal processing systems and devices
Including frequency control
381103, 333 28T, H03G 500
Patent
active
048457582
ABSTRACT:
A manually operated or automatic equalizer (1) with adjustable band filters for varying the frequency characteristic of an electric signal presented to an input (2) and for applying a frequency characteristic-adapted electric signal to an output (3). The equalizer has a plurality of band filters (F.sub.1 to Fn) with their bands located adjacent to one another in a given frequency range. The distance (frequency separation) between the central frequencies of filters having neighboring bands is greater than the distance between the central frequencies of one third octave filters having neighboring bands located at at least approximately the same frequencies as those of the band filters (F.sub.i). At least those band filters (F.sub.1 to F.sub.m) whose bands are located in the low-frequency part (f<450 Hz) of the frequency range have a central frequency (fc.sub.i) which is variable. A digital filter which can be used as a band filter in the equalizer is also described.
REFERENCES:
patent: 4206417 (1980-06-01), Poulo
patent: 4271398 (1981-06-01), Higashi et al.
patent: 4484345 (1984-11-01), Stearns
patent: 4628530 (1986-12-01), Op de Beek et al.
patent: 4633501 (1986-12-01), Werrbach
Kemna Johannes W.
Op de Beek Franciscus J.
Rijnsburger Johan M.
van Nieuwland Jacob M.
Franzblau Bernard
Isen Forester W.
U.S. Philips Corp.
LandOfFree
Equalizer with adjustable band filters and a digital filter suit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Equalizer with adjustable band filters and a digital filter suit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Equalizer with adjustable band filters and a digital filter suit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-858514