Patent · US Active

Digital high frequency phase compensation

US8345888B2 · kind B2 · utility

12Cited by

31References

16Claims

0Family size

Assignee

Bose Corporation · US

Inventors

Ricardo F. Carreras · Southborough, US
Daniel M. Gauger, Jr. · Cambridge, US
Steven H. Isabelle · Newton, US

Key dates

Filing date	Mar 30, 2010
Grant date	Jan 1, 2013
Priority date	—
Expiry date	Feb 9, 2031

Classification

Technology area (CPC G)Physics
CPC primaryG10K2210/3051
WIPO fieldOther consumer goods
WIPO sectorOther fields

Abstract

In an ANR circuit of a personal ANR device, a digital filter is structured to introduce one or more zeros to add gain to introduce positive phase in the provision of feedback-based ANR, wherein the gain follows a frequency-dependent “ski-slope” gain curve with little gain added at lower audible frequencies, with increasing gain that increases with frequency added at higher audible frequencies, and with the increasing gain flattening at frequencies above audible frequencies.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.