Title:
METHOD FOR ENHANCING NOISE-CANCELLING AMOUNT OF FEEDBACK ACTIVE NOISE-CANCELLING HEADPHONES, AND ACTIVE NOISE-CANCELLING HEADPHONES
Document Type and Number:
WIPO Patent Application WO/2017/024855
Kind Code:
A1
Abstract:
Disclosed are a method for enhancing a noise-cancelling amount of feedback active noise-cancelling headphones, and active noise-cancelling headphones, the method comprising: arranging a noise-canceling microphone of feedback active noise-cancelling headphones at a position away from directly in front of a speaker; and adjusting a relative position between the noise-canceling microphone and an ear canal opening of a wearer, enabling an open-loop transfer function L2(s0) at the ear canal opening and an open-loop transfer function L1(s0) at the noise-canceling microphone to satisfy a relation of |L2(s0)| > |L1(s0)|, so as to enhance an actual noise-cancelling amount at the ear canal opening. The method applied to supra-aural feedback active noise-cancelling headphones can address a problem of a thickness increase in the supra-aural headphones or wearing discomfort resulted from installation of a noise-canceling microphone directly in front of a speaker. The method applied to circumaural feedback active noise-cancelling headphones can address a problem in the existing art in which a noise-cancelling amount is considerably reduced at an ear canal opening of a wearer since a thicker padding is used, or a circuit gain is attenuated between a speaker and the ear canal opening of the wearer to avoid whistling.
Inventors:
HUA YANG (CN)
LI PENG (CN)
WANG RUOHUI (CN)
LI PENG (CN)
WANG RUOHUI (CN)
Application Number:
PCT/CN2016/083320
Publication Date:
February 16, 2017
Filing Date:
May 25, 2016
Export Citation:
Assignee:
QINGDAO GOERTEK TECH CO LTD (CN)
International Classes:
H04R3/02
Domestic Patent References:
| WO2000006066A1 | 2000-02-10 |
Foreign References:
| CN105049979A | 2015-11-11 | |||
| CN103024633A | 2013-04-03 | |||
| CN102447992A | 2012-05-09 | |||
| CN103748903A | 2014-04-23 |
Other References:
See also references of EP 3313090A4
Attorney, Agent or Firm:
BEIJING LONGAN LAW FIRM (CN)
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