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Pinna proximity detection

A technology of proximity and auricle, applied in earpiece/headphone accessories, earphones to reduce environmental noise, signal processing, etc., can solve problems such as consumption, not working well, high power, etc.

Active Publication Date: 2021-06-01
CIRRUS LOGIC INT SEMICON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this approach doesn't work well in the presence of low-frequency noise in loud ambient audio environments, it doesn't work well with loud playback audio, and it doesn't work well in adaptive ANC systems
Furthermore, this traditional solution consumes a lot of power in order to continuously transmit low frequency tones
[0006] Therefore, a method is needed to reliably detect off-ear situations in all different acoustic scenarios, and to do so in ANC headphones presents a challenge for pinna proximity detection that non-ANC headphones cannot

Method used

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Embodiment Construction

[0039]The present disclosure includes noise cancellation techniques and circuits that can be implemented in personal audio devices such as wireless phones. The personal audio device includes an ANC circuit that can measure the surrounding sound environment and generate a signal, which is injected into the speaker (or other transducer) output to eliminate the surrounding sound events. A reference microphone can be provided to measure the surrounding sound environment, and may include an error microphone to control adaptive anti-noise signals to eliminate an environmental audio sound, and for correcting the output of the output circuit via the transducer.

[0040]Reference nowFigure 1A The personal audio device 10 according to the embodiment of the present disclosure is shown as close to human ear 5. The personal audio device 10 is an example in which a device according to the embodiment of the present disclosure may be employed, but it should be understood that all components present in...

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Abstract

An integrated circuit for implementing at least a portion of a personal audio device may include an output for providing an output signal to a transducer, wherein the output signal includes a pilot signal, a microphone input for receiving a microphone signal from a microphone indicative of an output of the transducer, and a processing circuit. The processing circuit may be configured to implement a pilot signal control to apply an adjustment to the pilot signal as necessary to maintain the pilot signal at a substantially constant magnitude regardless of proximity of the transducer to a pinna and implement a proximity determination block configured to determine proximity of the transducer to the pinna based on the adjustment.

Description

Technical field[0001]The present disclosure generally relates to adaptive noise cancellation associated with acoustic transducers, and more particularly, to reset the filter coefficient of the adaptive noise cancellation system to minimize the audible artifact.Background technique[0002]Wireless phones (such as mobile / cellular phones), no wireless telephone, and other consumer audio devices (such as MP3 players) have been widely used. Noise cancellation can be improved by using the microphone measurement of environmental acoustic events and then using signal processing to eliminate environmental acoustic events in the output of the anti-noise signal into the output of the device to eliminate environmental acoustic events.[0003]The active noise reduction (ANC) system uses one or more microphone to observe the environmental noise and use a digital filter to process the noise signal (and then play by speaker) to achieve suppression of noise. Applications for active noise cancellations...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R3/02H04R1/10
CPCH04R1/1041H04R2201/10H04R1/1083H04R3/02H04R2430/03H04R2499/11G10K11/17853G10K11/17881G10K11/17875G10K11/17817G10K2210/3055G10K2210/3028G10K2210/1081G10K11/17833H04R3/005G10K11/17823H04M1/0202G10K2210/108G10K2210/3044G10K2210/3056G10K2210/3221
Inventor 维拉尔·帕里克乔恩·D·亨德里克斯杰弗里·D·艾德森维塔利·萨波日尼科夫纳菲塞·埃凡伊恩·赛义迪托马斯·I·哈维罗伯特·卢克
Owner CIRRUS LOGIC INT SEMICON
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