Unlock instant, AI-driven research and patent intelligence for your innovation.

Systems and methods for sharing secondary path information between audio channels in an adaptive noise cancellation system

A secondary path and audio signal technology, applied in active noise cancellation hearing devices, active noise control, earphones to reduce environmental noise, etc., can solve the problems of noise cancellation system performance degradation, decline, and not being considered

Active Publication Date: 2016-09-28
CIRRUS LOGIC INC
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The performance of the noise cancellation system degrades as the distance increases (e.g., the transducer is pressed against the ear with less pressure), partly because the gain of the transfer function from the error reference point to the drum reference point decreases with this increasing distance
This drop is not accounted for in traditional adaptive noise cancellation systems

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Systems and methods for sharing secondary path information between audio channels in an adaptive noise cancellation system
  • Systems and methods for sharing secondary path information between audio channels in an adaptive noise cancellation system
  • Systems and methods for sharing secondary path information between audio channels in an adaptive noise cancellation system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] Referring now to FIG. 1, a radiotelephone 10 is shown adjacent a person's ear 5, as shown in accordance with an embodiment of the present invention. Radiotelephone 10 is one example of a device that may employ techniques according to embodiments of the present invention, but it should be understood that no in-circuitry in the illustrated radiotelephone 10 or that depicted in the subsequent illustrations is required to practice the invention recited in the claims. All of the embodied elements or configurations. The radiotelephone 10 may include a transducer such as a speaker SPKR that reproduces far-end speech received by the radiotelephone 10, along with other local audio events such as ringtones, stored audio program material, near-end speech injected to provide a balanced conversational feel (i.e., the voice of the user of wireless phone 10), other audio that needs to be reproduced by wireless phone 10, such as sources from web pages or other network communications re...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

Systems and methods of the present disclosure include analyzing and comparing transfer functions associated with a plurality of electro-acoustic paths for transducers of a personal audio device to determine proximity of the transducers to respective ears of a listener of the personal audio device, quality of acoustic seals associated with the transducers, and for one or more other purposes.

Description

technical field [0001] The present invention relates generally to adaptive noise cancellation in relation to acoustic transducers, and more particularly to shaping information between audio channels in an adaptive noise cancellation system. Background technique [0002] Wireless telephones such as mobile / cellular telephones, cordless telephones and other consumer audio devices such as mp3 players are in widespread use. Noise cancellation can be provided to improve the performance of these devices in terms of intelligibility by using a microphone to measure the ambient sound event and then using signal processing to insert an anti-noise signal into the output of the device to cancel the ambient sound event. Because the acoustic environment around a personal audio device, such as a wireless telephone, can vary significantly depending on the noise sources present and the location of the device itself, it is desirable to adapt the noise cancellation to account for this environme...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H04R25/00G10K11/178H04R1/10
CPCH04R1/1083H04R25/00G10K2210/1081H04R2460/01H04R2460/15G10K11/17881G10K11/17817G10K11/17885G10K11/17854
Inventor N·卡瓦特拉
Owner CIRRUS LOGIC INC