University of California

Nativis, Inc.

Miller Puckette

John T Butters

Bennett M Butters

Elliot Patros

Patrick Naughton

Tahereh Afghah

A method for acoustic beamforming filter generation may be provided. Applying eigen decomposition to generate a matrix of eigenvectors and a matrix of eigenvalues to solve a pseudoinverse of a matrix of transfer functions. Substituting any eigenvalues in the matrix of eigenvalues that are less than a value of a gain control parameter with the value of the gain control parameter to form a revised matrix of eigenvalues. A matrix of spatial filter coefficients to apply to a sound signal received at least at the first speaker and at the second speaker may be calculated based on the matrix of eigenvectors, the revised matrix of eigenvalues, and a matrix of desired frequency responses.

Acoustic beamforming

A method and apparatus for producing an effect of a chemical or biochemical agent on a system responsive to such agent, are disclosed. In practicing the method, a plurality of low-frequency time-domain signals of the agent are generated, each at a different at a different noise level within a selected noise level range. The signals are analyzed by producing spectral plots of the time-domain signals, and identifying an optimized agent-specific time-domain signal based on information in the spectral plots. A chemical or biological system responsive to the agent is exposed to the optimized time-domain signal by placing the system within the magnetic field of an electromagnetic transducer, and applying the signal to the transducer at a signal amplitude and for a period sufficient to produce in the system an agent-specific effect on the system.

System and method for collecting, storing, processing, transmitting and presenting very low amplitude signals

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Encinitas, CA, United States of America

Miller Puckette