Electronic simulator of non-linear and active cochlear spectrum analysis
AssigneeCentral Institute for the Deaf
InventorJulius L. Goldstein
Life of this patent
Estimating the term…
Abstract
A model simulating cochlear spectrum analysis is disclosed which includes a pair of matched all pole lattices interconnected by a plurality of tip couplers providing non-linear distributed bilateral signal processing. One of the lattices along with the tip couplers corresponds to the organ of Corti found in the cochlea and the second lattice corresponds to the basilar membrane also found in the cochlea such that the model provides a striking resemblance in structure to the physical properties of the cochlea itself. With the cochlea model disclosed, distortion products and otoacoustic emissions are simulated. An intermediate model is also disclosed which provides bilateral signal processing but lacks distributed amplification.
Claims19
In a sound analyzer having means for receiving a complex sound input comprised of a plurality of frequencies and means for producing an output representative of the frequency response of a human ear, the improvement comprising said output means having means for producing acoustical distortion products as demonstrated to emanate from the human ear.
In a sound analyzer having means for receiving a complex sound input comprised of a plurality of frequencies and means for producing an output representative of the frequency response of a human ear, the improvement comprising means for varying the sensitivity of said analyzer in response to non-linear bilateral signal processing between said input and said output with respect to each of said plurality of frequencies of said complex sound input to thereby adjust said output.
In a sound analyzer having means for receiving a complex sound input comprised of a plurality of frequencies and means for producing an output representative of the frequency response of a human ear, the improvement comprising a non-linear, additive, directional wave amplifier means so that said plurality of frequencies may be added in proper time sequence at different locations within said output producing means, said amplifier means being connected between said receiving means and said output producing means.
In a sound analyzer having means for receiving a complex sound input comprised of a plurality of frequencies and means for producing an output representative of the frequency response of a human ear, the improvement comprising means for processing signals in both directions between input and output.
Dependencies are inferred from the claim text.