The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 07, 2006
Filed:
Feb. 02, 2001
Mark Alistair Poletti, Lower Hutt, NZ;
Mark Alistair Poletti, Lower Hutt, NZ;
Industrial Research Limited, Lower Hutt, NZ;
Abstract
A circular transducer array () is provided for use in recording a sound field. The array () comprises a plurality of microphones (), a digital signal processor (), frequency compensation filters () and a sum and difference network (). The digital signal processor calculates the Fourier transform of sampled output signals from the transducers to produce a plurality of sound wave components specifying the sound field. The frequency compensation network () equalises each component using Bassel functions to flatten the apparent response of the array (30) and the sum and difference network () then combines the equalised components to provide a plurality of audio signals which represent the sound field.