WO2004100690A3 - Facemask communication system - Google Patents

Facemask communication system Download PDF

Info

Publication number
WO2004100690A3
WO2004100690A3 PCT/SG2004/000128 SG2004000128W WO2004100690A3 WO 2004100690 A3 WO2004100690 A3 WO 2004100690A3 SG 2004000128 W SG2004000128 W SG 2004000128W WO 2004100690 A3 WO2004100690 A3 WO 2004100690A3
Authority
WO
WIPO (PCT)
Prior art keywords
microphones
facemask
signal
signals
audio signal
Prior art date
Application number
PCT/SG2004/000128
Other languages
French (fr)
Other versions
WO2004100690A2 (en
Inventor
Siew Kok Hui
Kok Heng Loh
Peter Pang
Shunli Wang
Original Assignee
Bitwave Private Ltd
Siew Kok Hui
Kok Heng Loh
Peter Pang
Shunli Wang
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 Bitwave Private Ltd, Siew Kok Hui, Kok Heng Loh, Peter Pang, Shunli Wang filed Critical Bitwave Private Ltd
Publication of WO2004100690A2 publication Critical patent/WO2004100690A2/en
Publication of WO2004100690A3 publication Critical patent/WO2004100690A3/en

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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/40—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
    • H04R1/406—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers microphones

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Telephone Set Structure (AREA)

Abstract

A facemask communication system includes a plurality of microphones (101) within the inside compartment of the facemask for detecting sounds voiced by the wearer. The microphones (101) have cardioid sound reception patterns even when the region at the rear of the microphones are blocked by channeling sound to the rear surfaces of the diaphragms through a sound guide. The signals from the microphones are wirelessly transmitted through the transparent window (205) of the facemask using electromagnetic radiation. After transmission through the transparent window (205), signal processing is performed on the signals. A digital signal processor processes the audio signal generated by the microphones in the time and frequency domain. The signal processor can include at least one adaptive filter to enhance a wanted signal in the audio signal and at least one adaptive filter to reduce an unwanted signal in the audio signal. Breathing noise in the signals is reduced using a plurality of microphones to provide signals to the signal processor. The system provides voice recognition for automatically responding to commands.
PCT/SG2004/000128 2003-05-19 2004-05-12 Facemask communication system WO2004100690A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SG200303248 2003-05-19
SG200303248-9 2003-05-19

Publications (2)

Publication Number Publication Date
WO2004100690A2 WO2004100690A2 (en) 2004-11-25
WO2004100690A3 true WO2004100690A3 (en) 2005-02-10

Family

ID=33448809

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SG2004/000128 WO2004100690A2 (en) 2003-05-19 2004-05-12 Facemask communication system

Country Status (1)

Country Link
WO (1) WO2004100690A2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007006732A1 (en) * 2007-02-06 2008-08-21 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Respirator with microphone
US11303982B1 (en) 2020-10-13 2022-04-12 Sierra N White Performance art microphone shield
US11689933B2 (en) 2021-04-26 2023-06-27 Microsoft Technology Licensing, Llc Face mask communication system with an embeddable microphone
WO2023194827A1 (en) * 2022-04-04 2023-10-12 3M Innovative Properties Company Local voice recognition and processing within a head worn device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4491699A (en) * 1981-04-15 1985-01-01 Nl Industries, Inc. Communication apparatus for hostile environments
AT378652B (en) * 1983-12-27 1985-09-10 Akg Akustische Kino Geraete ARRANGEMENT FOR VOICE TRANSFER FROM A RESPIRATORY MASK
US4888807A (en) * 1989-01-18 1989-12-19 Audio-Technica U.S., Inc. Variable pattern microphone system
EP0493361A2 (en) * 1990-12-27 1992-07-01 AKG Akustische u. Kino-Geräte Gesellschaft m.b.H. Telephone-handset fitted with a directional microphone
US20020166557A1 (en) * 2001-05-09 2002-11-14 David Cooper Mask with a built-in microphone

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4491699A (en) * 1981-04-15 1985-01-01 Nl Industries, Inc. Communication apparatus for hostile environments
AT378652B (en) * 1983-12-27 1985-09-10 Akg Akustische Kino Geraete ARRANGEMENT FOR VOICE TRANSFER FROM A RESPIRATORY MASK
US4888807A (en) * 1989-01-18 1989-12-19 Audio-Technica U.S., Inc. Variable pattern microphone system
EP0493361A2 (en) * 1990-12-27 1992-07-01 AKG Akustische u. Kino-Geräte Gesellschaft m.b.H. Telephone-handset fitted with a directional microphone
US20020166557A1 (en) * 2001-05-09 2002-11-14 David Cooper Mask with a built-in microphone

Also Published As

Publication number Publication date
WO2004100690A2 (en) 2004-11-25

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