KR970707665A - 노이즈 삭제 장치(noise cancellation apparatus) - Google Patents

노이즈 삭제 장치(noise cancellation apparatus)

Info

Publication number
KR970707665A
KR970707665A KR1019970703231A KR19970703231A KR970707665A KR 970707665 A KR970707665 A KR 970707665A KR 1019970703231 A KR1019970703231 A KR 1019970703231A KR 19970703231 A KR19970703231 A KR 19970703231A KR 970707665 A KR970707665 A KR 970707665A
Authority
KR
South Korea
Prior art keywords
microphone
sound
signal
housing
background noise
Prior art date
Application number
KR1019970703231A
Other languages
English (en)
Inventor
더글라스 안드레아
마틴 토프
Original Assignee
더글라스 안드레아
안드레아 일렉트로닉스 코포레이션
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 더글라스 안드레아, 안드레아 일렉트로닉스 코포레이션 filed Critical 더글라스 안드레아
Publication of KR970707665A publication Critical patent/KR970707665A/ko

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/6008—Substation equipment, e.g. for use by subscribers including speech amplifiers in the transmitter circuit
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/04—Supports for telephone transmitters or receivers
    • H04M1/05—Supports for telephone transmitters or receivers specially adapted for use on head, throat or breast
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/19—Arrangements of transmitters, receivers, or complete sets to prevent eavesdropping, to attenuate local noise or to prevent undesired transmission; Mouthpieces or receivers specially adapted therefor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1083—Reduction of ambient noise
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/02—Circuits for transducers, loudspeakers or microphones for preventing acoustic reaction, i.e. acoustic oscillatory feedback
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H04B1/12—Neutralising, balancing, or compensation arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
    • H04R2201/10—Details of earpieces, attachments therefor, earphones or monophonic headphones covered by H04R1/10 but not provided for in any of its subgroups
    • H04R2201/107—Monophonic and stereophonic headphones with microphone for two-way hands free communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
    • H04R2201/40—Details of arrangements for obtaining desired directional characteristic by combining a number of identical transducers covered by H04R1/40 but not provided for in any of its subgroups
    • H04R2201/403—Linear arrays of transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R29/00—Monitoring arrangements; Testing arrangements
    • H04R29/004—Monitoring arrangements; Testing arrangements for microphones
    • H04R29/005—Microphone arrays
    • H04R29/006—Microphone matching
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/005—Circuits for transducers, loudspeakers or microphones for combining the signals of two or more microphones

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • General Health & Medical Sciences (AREA)
  • Telephone Set Structure (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Noise Elimination (AREA)
  • Circuit For Audible Band Transducer (AREA)

Abstract

본 발명은 전화 핸드세트(10)나 붐 마이크로폰 장치(100) 또는 붐 헤드세트(401) 등에 사용되는 음향 배경 노이즈를 감소시키기 위한 장치에 관한 것이다. 상기 장치는 제1마이크로폰(12)과 제2마이크로폰(14)을 포함하며, 상기 제1마이크로폰(12)은 희망의 소리와, 상기 소리의 근방에 존재하는 배경 노이즈를 수신하고, 상기 제2마이크로폰(14)은 배경 노이즈만을 수신하도록 배치된다. 제2마이크로폰(14)으로부터의 배경 노이즈는 애응의 전기 신호로 변환되며, 소리를 제공하는 신호를 생성하기 위하여 제1마이크로폰(12)으로부터 얻어지는 배경 노이즈와 소리에 대응하는 신호로부터 공제된다.

Description

노이즈 삭제 장치(NOISE CANCELLATION APPARATUS)
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 본 발명의 실시예에 따른 노이즈 감소장치를 갖는 전화를 도시한 도면, 제2도는 제1도의 전화에 사용된 노이즈 감소장치의 블록도, 제5도는 제2도에 도시된 노이즈 감소장치의 다른 개략적인 다이아그램.

Claims (11)

  1. 배경 노이즈와 장치를 작동하는 작동자로부터의 소리로 구성된 제1음향 신호를 수신한 후 이를 제1신호로 변환하기 위한 제1마이크로폰 수단과 상기 제1마이크로폰 수단에 대해 설정된 각도(θ)로 배치되고 배경 노이즈로 구성된 제2음향 사운드를 수신한 후 이를 제2신호로 변환시키기 위한 제2마이크로폰 수단을 구비하는 하우징과, 상기 소리를 제공하는 신호를 얻기 위하여 제1신호로부터 제2신호를 공제하는 수단을 포함하는 것을 특징으로 하는 노이즈 감소장치.
  2. 제1항에 있어서, 제1 및 제2마이크로폰 수단의 적어도 하나는 복수개의 마이크로폰을 포함하는 것을 특징으로 하는 노이즈 감소장치.
  3. 제1항에 있어서, 제1 및/또는 제2마이크로폰 수단은 복수개의 마이크로폰을 포함하며, 제1 및/또는 제2마이크로폰 수단으로부터의 출력은 희망의 성능에 따라 무게를 갖는 몇 개의 마이크로폰 출력 전압의 총합을 포함하는 것을 특징으로 하는 노이즈 감소장치.
  4. 제3항에 있어서, 상기 희망의 성능은 점진적인 서치 알고리즘인 것을 특징으로 하는 노이즈 감소장치.
  5. 배경 노이즈를 감소시키기 위한 마이크로폰 장치에 있어서, 하우징과, 제1입력 감응 표면을 가지며 배경 노이즈와 장치를 작동시키는 작동자로부터 발생되는 소리로 구성된 제1음향 사운드를 수신하기 위해 상기 하우징내에 배치되는 제1마이크로폰과, 제2압력 감응 표면을 가지며 배경 노이즈로 구성된 제2음향 사운드를 수신하기 위해 상기 하우징내에 배치되는 제2마이크로폰과, 상기 소리를 제공하는 신호를 얻기 위하여 제1신호에서 제2신호를 공제하는 수단을 포함하며, 상기 제1마이크로폰은 제1음향 사운드를 제1신호로 변환시키며, 상이 제2마이크로폰은 제2음향 신호를 제2신호로 변환시키며, 상기 제2압력 감응 표면은 제1압력 감응 표면에 대해 설정된 각도로 배치되는 것을 특징으로 하는 마이크로폰 장치.
  6. 제5항에 있어서, 상기 설정된 각도는 180°인 것을 특징으로 하는 마이크로폰 장치.
  7. 제6항에 있어서, 상기 제1 및 제2감응 표면은 서로에 대해 설정된 양 이하로 배치되는 것을 특징으로 하는 마이크로폰 장치.
  8. 제7항에 있어서, 상기 설정된 양은 약 0.25인치인 것을 특징으로 하는 마이크로폰 장치.
  9. 제1항에 있어서, 상기 설정된 각도(Φ)는 약 30°내지 60°의 범위내에 속하는 것을 특징으로 하는 노이즈 감소 장치.
  10. 제9항에 있어서, 상기 제1마이크로폰 수단은 제1음향 사운드를 수신하는 상기 제1마이크로폰 수단의 일부를 통과하는 평면과 소리의 입력 방향 사이에 형성된 각도(θ)가 약 35°이하가 되도록 하우징에 배치되는 것을 특징으로 하는 노이즈 감소 장치.
  11. 제10항에 있어서, 상기 제2마이크로폰 수단은 제2마이크로폰 수단의 수신부에 수직인 축선과 상기 소리의 방향 사이에 형성된 각도(β)가[(90-θ)+Φ]가 되도록 하우징에 배치되는 것을 특징으로 하는 노이즈 감소 장치.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019970703231A 1994-11-14 1995-11-14 노이즈 삭제 장치(noise cancellation apparatus) KR970707665A (ko)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/339,126 1994-11-14
US08/339,126 US5673325A (en) 1992-10-29 1994-11-14 Noise cancellation apparatus

Publications (1)

Publication Number Publication Date
KR970707665A true KR970707665A (ko) 1997-12-01

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Application Number Title Priority Date Filing Date
KR1019970703231A KR970707665A (ko) 1994-11-14 1995-11-14 노이즈 삭제 장치(noise cancellation apparatus)

Country Status (10)

Country Link
US (1) US5673325A (ko)
EP (1) EP0792568A4 (ko)
JP (1) JPH10509849A (ko)
KR (1) KR970707665A (ko)
CN (1) CN1172422A (ko)
AU (1) AU4235996A (ko)
BR (1) BR9509782A (ko)
CA (1) CA2204880C (ko)
FI (1) FI972048A (ko)
WO (1) WO1996015541A1 (ko)

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AU4235996A (en) 1996-06-06
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BR9509782A (pt) 1998-05-26
CA2204880A1 (en) 1996-05-23
MX9703511A (es) 1997-07-31
FI972048A (fi) 1997-07-07
JPH10509849A (ja) 1998-09-22
FI972048A0 (fi) 1997-05-14
US5673325A (en) 1997-09-30
EP0792568A4 (en) 1998-07-08
CN1172422A (zh) 1998-02-04
CA2204880C (en) 2001-05-29

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