EP0618751A1 - Capteur microphonique de contact pour casques de protection et similaires - Google Patents

Capteur microphonique de contact pour casques de protection et similaires Download PDF

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Publication number
EP0618751A1
EP0618751A1 EP94103734A EP94103734A EP0618751A1 EP 0618751 A1 EP0618751 A1 EP 0618751A1 EP 94103734 A EP94103734 A EP 94103734A EP 94103734 A EP94103734 A EP 94103734A EP 0618751 A1 EP0618751 A1 EP 0618751A1
Authority
EP
European Patent Office
Prior art keywords
borne noise
microphone according
noise microphone
bellows
base body
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP94103734A
Other languages
German (de)
English (en)
Inventor
Berthold Dipl.-Ing. Hemer
Günter Hohmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ceotronics Elektronische Hor- und Sprechsysteme GmbH
Original Assignee
Ceotronics Elektronische Hor- und Sprechsysteme GmbH
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 Ceotronics Elektronische Hor- und Sprechsysteme GmbH filed Critical Ceotronics Elektronische Hor- und Sprechsysteme GmbH
Publication of EP0618751A1 publication Critical patent/EP0618751A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A42—HEADWEAR
    • A42B—HATS; HEAD COVERINGS
    • A42B3/00—Helmets; Helmet covers ; Other protective head coverings
    • A42B3/04—Parts, details or accessories of helmets
    • A42B3/30—Mounting radio sets or communication systems
    • 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
    • H04R1/46—Special adaptations for use as contact microphones, e.g. on musical instrument, on stethoscope

Definitions

  • the invention relates to a structure-borne noise microphone according to the preamble of patent claim 1.
  • Two-way radios are needed in many civil and military fields so that different people who can work together over long distances or in very noisy conditions can communicate.
  • a known example of the use of such radio devices is the airport apron, where people have to communicate via radio devices. They are exposed to the noise of the jet engines and therefore wear ear muffs that perform a dual function, because they not only dampen the ambient noise, but also contain audio-speaking devices with which they can reproduce other people's messages sent by radio and with which they can People can speak back.
  • the microphone is usually located directly in front of the person's mouth and is also partially voice-controlled, i.e. H. the acoustic signals it receives are only passed on by radio if they are voice signals. This prevents the noise from the jet engines from causing a transmission circuit.
  • the people equipped with such a headphone-microphone combination can talk to each other without having to hold a microphone or the like in their hands.
  • Such headphones are not suitable for some areas of application because a microphone in front of the mouth is either too cumbersome for the wearer or technically cannot be attached at all, e.g. B. firefighters who have to wear a respirator, motorcycle police squadrons, whose modern full-face helmets can be folded up with their entire front part, so that they can no longer communicate with the front part folded up, in which there is traditionally a microphone.
  • a structure-borne sound microphone which can be worn on the inside of a helmet and which is connected to the top of the skull (US Pat. No. 3,787,641).
  • Structure-borne sound and bone conduction microphones are operated by the energy generated by the sound vibrations of the skull bones.
  • the microphone converter usually consists of a sensitive and light accelerometer that is in close contact with the head and records the bone vibrations and generates the output signals that correspond to the sound vibrations.
  • a relatively small microphone holder is provided which receives and holds the microphone
  • a relatively large microphone support plate is provided which has an opening which is larger than that Microphone holder is and the microphone holder with the microphone.
  • the microphone support plate surrounds the microphone holder at a distance, wherein several springs, which are designed, for example, as rubber webs, are provided between the microphone holder and the microphone support plate in order to hold the microphone in the opening and to hold it against the head of a user to press a certain pressure.
  • a disadvantage of the known structure-borne sound microphone is that it only carries very weak low-frequency signals via a line, which are insufficient or only insufficient for a good understanding of the speech.
  • a device with a structure-borne sound microphone which emits an amplified signal which is used directly for driving a loudspeaker can be used (DE-GM 89 03 602). Under certain conditions, the pressure of the microphone on the skullcap of a helmet wearer can be felt as uncomfortable.
  • a contact microphone is also known, which rests on the top of the skull and via damping means in a shockproof housing, for.
  • a helmet is housed (US-A-4 087 653). No measures have been taken to reduce the pressure of the microphone on the cranium.
  • Another known voice transmission device has a piezo structure-borne sound microphone which is provided on the bottom of a foam-elastic hollow receptacle (EP-A-0 519 621). This device, however, also exerts excessive compressive forces on the top of the skull.
  • a contact microphone which has a piezo element which is supported on one side of a special contact element (DE-A-30 23 155).
  • a contact element DE-A-30 23 155.
  • the elasticity of this contact element is not very great.
  • the invention has for its object to provide a structure-borne sound microphone that always ensures good contact with the body without generating painful pressure.
  • the advantage achieved by the invention is, in particular, that on the one hand a sufficient contact pressure is ensured for the most varied helmet constructions and head shapes, without on the other hand impairing the wearing comfort.
  • FIG. 1 shows a contact microphone 1 according to the invention, which consists of a rubber housing and parts built into this housing 2. These parts, to which the actual microphone belongs, are not visible in FIG. 1.
  • the rubber housing 2 has a flat base body 3, which is provided with a rubber bellows 4. This rubber bellows 4 extends downwards in the direction of a head, not shown, whose structure-borne noise is to be recorded.
  • a Velcro fastener 5 is attached to the housing 2 opposite the rubber bellows 4. This Velcro 5 is glued to a hole 6 provided with a rubber cover 7 of the housing 2. With the help of the Velcro 5, the contact microphone 1 is attached to the inside of a helmet or the like.
  • the Velcro fastener 5 has the shape of a circular ring which surrounds an opening 8 which leads to the inner volume of the rubber bellows 4.
  • the microphone (not visible in FIG. 1) is accommodated on the inside and on the bottom of the rubber bellows 4. This microphone is connected to an electrical connecting line 9, which has a plug 10.
  • the contact microphone 1 is shown from the side. It can be seen here that the rubber bellows 4 has two folds 11, 12. This rubber bellows 4 ensures that a perfect contact of the microphone with the cranium is made without causing an increased and painful contact pressure.
  • the entire rubber bellows 4 is about sixteen millimeters high, the base body 3 z. B. is six millimeters thick and 65 millimeters long.
  • the bulges 13, 14, which connect to the respective folds 11, 12, have different diameters and thus areas.
  • the area of the underside 15 is approximately five square centimeters, while the area enclosed by the bulge 13 is approximately thirteen square centimeters.
  • the contact microphone 1 is designed so that over sixty percent of the maximum output level of the amplifier with a contact force of only eighty grams, i. H. can be achieved with a contact pressure of 16 g / cm2, which corresponds to a compression of the rubber bellows 4 by two millimeters.
  • the lower bulge 14 is in this compressed end position when heavy helmets are worn.
  • the weight of these helmets is then distributed over a total of thirteen square centimeters of contact area, which are formed by the underside 15 and the bead 13.
  • FIG. 3 shows a top view of the contact microphone 1, which provides an insight into the rubber bellows 4.
  • the actual microphone 17, which is, for example, a piezoelectric microphone, is located on the bottom 16 of the bellows 4. This microphone 17 is connected via lines 18, 19 to the connecting line 9.
  • the contact microphone 1 is shown again in perspective, but with the rubber cover 7 opened.
  • a circuit board 20 can be seen which lies on a bottom 21 of the housing 3.
  • another line 22 can be seen, the connections of which are connected to printed circuit board 20.
  • An inward projection 23 is provided at a distance from the bottom 21 and around the housing 3.
  • the edge 24 of the rubber cover is pushed under this projection 23 when closing or during assembly of the contact microphone 1.
  • This rubber cover 7 has a recess on its invisible upper side, the dimensions of which correspond to the dimensions of the projection 23.
  • the cover 7 with the Velcro fastener 5 can be completely removed from the body 3.
  • FIG. 5 shows a protective helmet 30 for motorcyclists, which has an outer hood 31 and an inner hood 32, the inner hood 32 merging into the outer hood 31 in the rear area and being spaced apart in the front area.
  • a soft cushion layer 33 is arranged beneath the inner hood 32 and is opposite a headband 34. Between the headband 34 and the cushion layer 33 there are two leather bands 35, 36 which are connected to one another via a textile net 40.
  • the leather straps 35, 36 have tabs 37, 38 on the outer or inner hood 31, 32 are attached.
  • a neck pad 39 is provided, which serves to support the neck of the motorcycle rider.
  • the contact microphone 1 can also be inserted at the folds 11 and / or 12 in a so-called buttonhole, ie. H. the Velcro 5 can then be omitted.
  • a circular base body can also be provided, under which the bellows is located.
  • the board is designed differently and adapted to the circular shape.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Helmets And Other Head Coverings (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
EP94103734A 1993-04-02 1994-03-11 Capteur microphonique de contact pour casques de protection et similaires Withdrawn EP0618751A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4310793 1993-04-02
DE19934310793 DE4310793A1 (de) 1993-04-02 1993-04-02 Körperschall-Mikrofon für Schutzhelme oder dergleichen

Publications (1)

Publication Number Publication Date
EP0618751A1 true EP0618751A1 (fr) 1994-10-05

Family

ID=6484536

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94103734A Withdrawn EP0618751A1 (fr) 1993-04-02 1994-03-11 Capteur microphonique de contact pour casques de protection et similaires

Country Status (4)

Country Link
EP (1) EP0618751A1 (fr)
JP (1) JPH06327077A (fr)
AU (1) AU5901194A (fr)
DE (1) DE4310793A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005004655A1 (fr) * 2003-06-30 2005-01-20 Mine Safety Appliances Company Dispositif de communication pour casque de protection
US20090041269A1 (en) * 2007-08-09 2009-02-12 Ceotronics Aktiengesellschaft Audio, Video, Data Communication Sound transducer for the transmission of audio signals
WO2016180824A1 (fr) * 2015-05-11 2016-11-17 Pfanner Schutzbekleidung Gmbh Casque de protection
EP3298919A1 (fr) * 2016-09-23 2018-03-28 Jarvish Inc. Casque
US10492558B2 (en) 2013-10-24 2019-12-03 Pfanner Schutzbekleidung Gmbh Protective glasses for fitting on a protective helmet, and protective helmet provided with the protective glasses

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI103747B1 (fi) 1998-01-29 1999-08-31 Emf Acoustics Oy Ltd Värähtelymuunninyksikkö
DE19843731C2 (de) * 1998-09-24 2001-10-25 Sennheiser Electronic Vorrichtung zur Schallwandlung
DE19845608A1 (de) * 1998-10-05 2000-04-06 Ceotronics Ag Hör-Sprechsystem
DE10004408C1 (de) * 2000-02-02 2001-06-21 Paragon Sensors & Systems Ag Mikrofonmodul

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4601361A (en) * 1984-01-26 1986-07-22 Nippon Gakki Seizo Kabushiki Kaisha Structure for mounting loudspeaker on electronic musical instrument
DE8903602U1 (de) * 1989-03-22 1989-06-22 Ceotronics GmbH Elektronische Hör- und Sprechsysteme, 6074 Rödermark Vorrichtung mit einem Kontaktmikrofon für einen Schutzhelm o.dgl.
US4924502A (en) * 1987-05-08 1990-05-08 Allen Clayton H Means for stabilizing sound pressure produced at the eardrum under an earpad

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4601361A (en) * 1984-01-26 1986-07-22 Nippon Gakki Seizo Kabushiki Kaisha Structure for mounting loudspeaker on electronic musical instrument
US4924502A (en) * 1987-05-08 1990-05-08 Allen Clayton H Means for stabilizing sound pressure produced at the eardrum under an earpad
DE8903602U1 (de) * 1989-03-22 1989-06-22 Ceotronics GmbH Elektronische Hör- und Sprechsysteme, 6074 Rödermark Vorrichtung mit einem Kontaktmikrofon für einen Schutzhelm o.dgl.

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005004655A1 (fr) * 2003-06-30 2005-01-20 Mine Safety Appliances Company Dispositif de communication pour casque de protection
US7110743B2 (en) 2003-06-30 2006-09-19 Mine Safety Appliances Company Communications device for a protective helmet
US20090041269A1 (en) * 2007-08-09 2009-02-12 Ceotronics Aktiengesellschaft Audio, Video, Data Communication Sound transducer for the transmission of audio signals
EP2026596A1 (fr) * 2007-08-09 2009-02-18 Ceotronics AG Audio Video Data Communication Emetteur de son destiné à la transmission de signaux audio
DE102007037561A1 (de) 2007-08-09 2009-02-19 Ceotronics Aktiengesellschaft Audio . Video . Data Communication Schallwandler zur Übertragung von Audiosignalen
US8213643B2 (en) 2007-08-09 2012-07-03 Ceotronics Aktiengesellschaft Audio, Video, Data Communication Sound transducer for the transmission of audio signals
US10492558B2 (en) 2013-10-24 2019-12-03 Pfanner Schutzbekleidung Gmbh Protective glasses for fitting on a protective helmet, and protective helmet provided with the protective glasses
WO2016180824A1 (fr) * 2015-05-11 2016-11-17 Pfanner Schutzbekleidung Gmbh Casque de protection
AU2016261297B2 (en) * 2015-05-11 2019-04-11 Pfanner Schutzbekleidung Gmbh Protective helmet
US10271606B2 (en) 2015-05-11 2019-04-30 Pfanner Schutzbekleidung Gmbh Protective helmet
EA033178B1 (ru) * 2015-05-11 2019-09-30 Пфаннер Шутцбеклайдунг Гмбх Защитная каска
EP3298919A1 (fr) * 2016-09-23 2018-03-28 Jarvish Inc. Casque

Also Published As

Publication number Publication date
AU5901194A (en) 1994-10-06
JPH06327077A (ja) 1994-11-25
DE4310793A1 (de) 1994-10-06

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