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Noise-canceling headphone

A head-worn and earphone technology, which is applied in earphone/earphone accessories, earphones to reduce environmental noise, transducer circuits, etc.

Inactive Publication Date: 2012-02-01
AUDIO-TECHNICA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the feedforward type has the following disadvantages: If the noise reduction effect is to be obtained in a frequency band of a certain bandwidth, the noise reduction effect of each bandwidth will decrease
In feed-forward noise-cancelling headphones, even if you try to cancel the noise with the microphone facing the outside, the noise still remains in the front air chamber, which is difficult to cancel

Method used

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Examples

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Embodiment Construction

[0036] Next, embodiments of the noise-canceling headphone according to the present invention will be described with reference to the drawings.

[0037] figure 1 Among them, the noise canceling headphone 101 has a housing 22 , a driver unit 4 provided on the housing 22 , and a microphone unit 1 mounted on the housing 22 toward the outside. The noise-canceling headphone 101 has the same structure as a general headphone, and includes a sound-insulating board 25 as a support substrate as a whole, and an ear pad 23 covering the user's ear 24 is attached to the periphery of one side surface.

[0038] Moreover, other structures inside the casing 22 (rear air chamber described later), in addition to the above-mentioned structure and utilization Figure 2 to Figure 4 In addition to the configurations described below, the following configurations may be added based on appropriate design ideas. For example, in order to design it as a wireless earphone that can hear and hear sounds thro...

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PUM

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Abstract

A noise-canceling headphone that cancels external noise with a feedforward system includes a driver unit disposed in a housing, a microphone unit that is outwardly disposed in the housing and collects the external noise, and canceling signal generator that generates a noise-canceling signal having a phase opposite to the noise entering through the headphone. The noise-canceling headphone includes an error detecting microphone unit that detects error noise uncanceled by the feedforward system, and error noise-canceling signal generator that generates an error correction signal to cancel the error noise with a feedback system.

Description

technical field [0001] The invention relates to a head-mounted noise-cancelling earphone, which eliminates the noise that cannot be completely eliminated by the existing feed-forward head-mounted noise-cancelling earphone through a feedback error signal compensation circuit. Background technique [0002] The noise-cancelling headphones are configured to analyze the noise collected by the microphone, generate a canceling sound of the same volume at the opposite phase to the noise that the user can hear through the headphones, and cancel the noise with the canceling sound. Reduce noise. As a noise-canceling headphone that is relatively close to the technical idea of ​​the present invention, for example, in the invention described in Patent Document 1, a headphone is disclosed that has a speaker unit driven by a musical sound signal. The noise cancellation signal generated by the noise signal detected by the microphone unit drives the frame of the speaker unit. [0003] In co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R1/10H04R3/00
CPCH04R1/1083
Inventor 木村富至
Owner AUDIO-TECHNICA
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