Adaptive signal weighting system

DETAILED DESCRIPTION What is claimed is: 1.
An adaptive signal weighting system: including a signal path for transmitting an electrical information signal of a predetermined bandwidth through said system, said system further comprising: filter means disposed in said signal path for varying the gain impressed on the portion of said information signal within a first select spectral region within said predetermined bandwidth by a first variable gain factor, said first variable gain factor varying in response to and as a function of a first control signal; means for generating said first control signal only in response to and in accordance with the signal energy of said information signal within a second select spectral region including at least a part of said first select spectral region; gain control means disposed in said signal path and coupled to said filter means for varying the signal gain impressed on said information signal substantially throughout said predetermined bandwidth by a second variable gain factor, said second variable gain factor varying in response to and as a function of a second control signal; and means for generating said second control signal in response to and as a function of the signal energy of said information signal substantially within a third select spectral region within said predetermined bandwidth.
2.
A system according to claim 1, wherein said means for generating said second control signal includes means for detecting the signal energy of said information signal below about 5 KHz.
3.
A system according to claim 1, wherein said filter means includes means for varying the first variable gain factor impressed on said portion of said information signal so that said first variable gain factor varies from amplification for signals having relatively high energy within said second select spectral region to attenuation for signals having relatively low energy within said second select spectral region.
4.
A system according to claim 1, wherein said filter means includes frequency discrimination means for detecting said portion of said information signal within said first select spectral region and for generating a third signal representative of said portion, and second gain control means coupled to said frequency discrimination means for varying the gain impressed on said third signal in response to and as a function of said first control signal