DE2460535A1 - Personal sound proofing against surrounding noise - having signal adapted interference suppression whilst maintaining aural determination of directions - Google Patents

Personal sound proofing against surrounding noise - having signal adapted interference suppression whilst maintaining aural determination of directions

Info

Publication number
DE2460535A1
DE2460535A1 DE19742460535 DE2460535A DE2460535A1 DE 2460535 A1 DE2460535 A1 DE 2460535A1 DE 19742460535 DE19742460535 DE 19742460535 DE 2460535 A DE2460535 A DE 2460535A DE 2460535 A1 DE2460535 A1 DE 2460535A1
Authority
DE
Germany
Prior art keywords
amplifier
microphones
signal adapted
interference suppression
aural
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.)
Pending
Application number
DE19742460535
Other languages
German (de)
Inventor
Franz Quante
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.)
Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
Original Assignee
Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
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 Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV filed Critical Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
Priority to DE19742460535 priority Critical patent/DE2460535A1/en
Publication of DE2460535A1 publication Critical patent/DE2460535A1/en
Pending legal-status Critical Current

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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F11/00Methods or devices for treatment of the ears or hearing sense; Non-electric hearing aids; Methods or devices for enabling ear patients to achieve auditory perception through physiological senses other than hearing sense; Protective devices for the ears, carried on the body or in the hand
    • A61F11/06Protective devices for the ears
    • A61F11/14Protective devices for the ears external, e.g. earcaps or earmuffs
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F11/00Methods or devices for treatment of the ears or hearing sense; Non-electric hearing aids; Methods or devices for enabling ear patients to achieve auditory perception through physiological senses other than hearing sense; Protective devices for the ears, carried on the body or in the hand
    • A61F11/06Protective devices for the ears
    • A61F11/14Protective devices for the ears external, e.g. earcaps or earmuffs
    • A61F11/145Protective devices for the ears external, e.g. earcaps or earmuffs electric, e.g. for active noise reduction

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biomedical Technology (AREA)
  • Acoustics & Sound (AREA)
  • Biophysics (AREA)
  • Otolaryngology (AREA)
  • Psychology (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Headphones And Earphones (AREA)

Abstract

The equipment has two microphones and a dual channel amplifier built into it. The microphones can imitate the directional characteristics of the human ear. The amplifier can be coupled to a probe microphone so that running machine sounds can be checked for faults at specific points on a very noisy machine. A signal adapted interference suppressor can be built into the amplifier. Frequency selected filters can be used to filter out high power density spectral regions without affecting understanding of normal levels of speech. The amplifier can be regulated to switch off at given intervals to protect against periodic noise peaks ie when a hammer or press is in use.

Description

Persönlicher Schallschutz mit signal angepaßter Störunterdrückung und Erhaltung des Richtungshörens Die Erfindung betrifft einen Schallschutz zum Einsatz in lauten Fabrikhallen und unter sonstigen Bedingungen, in denen der Lärmpegel die Schmerzschwelle erreicht oder bei Dauereinwirkung zu irreversiblen Schäden des Innenohres führt.Personal noise protection with interference suppression adapted to the signal and preservation of directional hearing The invention relates to noise protection for Use in noisy factory halls and in other conditions where the noise level the pain threshold is reached or, with long-term exposure, irreversible damage to the Inner ear leads.

Zu diesem Zweck wurden Ohrschütze mit beträchtlicher Schalldämpfung entwickelt. Den Nachteil des Informationsverlustes im akustischen Kanal suchte man durch nachträglichen Einbau einer elektroakustischen Übertragungseinrichtung mit einem Mikrophon, regelbarem Verstärker und Kopfhörer in das Schutzsystem auszugleichen.For this purpose, earmuffs with considerable sound attenuation were developed developed. The disadvantage of information loss in the acoustic channel was sought by retrofitting an electroacoustic transmission device a microphone, adjustable amplifier and headphones in the protection system.

Diese Vorrichtung weist zwei schwere Nachteile auf: 1. Die Sprachverständlichkeit ist geringer als bei direktem Hören.This device has two serious disadvantages: 1. Speech intelligibility is less than when listening directly.

Bei Sprachübertragung mittels eines einkanaligen Systems geht dem Menschen die Fähigkeit zur Nachhallunterdrückung verloren (Danilenko, L.: Linaurales Hören im nichtstationären diffusen Schallfeld; Diss. TH Aachen 1968), was zu einer Minderung der Sprachverständlichkeit im Gegensatz zum binauralen Hören führt. This is possible with voice transmission using a single-channel system People lost the ability to suppress reverberation (Danilenko, L .: Linaurales Hearing in the non-stationary diffuse sound field; Diss. TH Aachen 1968), resulting in a Reduced speech intelligibility in contrast to binaural hearing.

2. Der Mensch verliert die Fähigkeit zum Richtungshören, eine Eigenschaft des binauralen Hören.2. Man loses the ability to hear directions, a quality of binaural hearing.

Diese Mängel führen dazu, daß das Schutzsystem von den Betroffenen oft nicht benutzt wird und sie sich einer besseren Hommunikaion willen dem schädigenden Lärmpegel aussetzen Dieser Mißstand wird erfindungsgemäß durch ein neues Schutz- und Uerständigungssystem beseitigt. Es zeichnet sich durch die Kombination von Ohrschützen mit zwei Mikrophonen aus, die so ausgelegt und angeordnet werden, daß sie die Richtcharakteristik des menschlichen Ohres nachbilden (Schirmer, W.: Die Richtcharakteristik des Ohres; Zeitschrift für Hochfrequenztechnik und Elektroakustik 72, 1963, S. 63).These deficiencies lead to the protection system from those affected is often not used and they want a better communicaion for the sake of the injurious Exposing to noise levels This drawback is inventively by a new protection and agreement system eliminated. It is characterized by the combination from earmuffs with two microphones, which are laid out and arranged in such a way that that they reproduce the directional characteristic of the human ear (Schirmer, W .: The directional characteristic of the ear; Magazine for high frequency technology and electroacoustics 72, 1963, p. 63).

Die Mikrophonsignale werden über einen zweikanaligen Verstärker je einem Kopfhörer am rechten und linken Ohr zugeführt.The microphone signals are each via a two-channel amplifier fed to headphones on the right and left ears.

Die spezielle zweikanalige Mikrophonanordnung hat folgende Vorteile: 1. Die Sprachverständlichkeit wird optimiert, d.h. sie erreicht die Werte bei direktem Hören (Quante, F.: Die Verständlichkeit von Sprachübertragungen aus einem lärmerfüllten Raum. Fortschritte der Akustik, UDI-Verlag Düsseldorf, 1973, S. 493).The special two-channel microphone arrangement has the following advantages: 1. Speech intelligibility is optimized, i.e. it reaches the values with direct Hearing (Quante, F .: The intelligibility of speech transmissions from a noisy Space. Acoustics Advances, UDI-Verlag Düsseldorf, 1973, p. 493).

2. Das Richtungshören bleibt näherungsweise erhalten und die Orientierungsfähigkeit des Menschen ist besser als bei Verwendung eines Mikrophones.2. The directional hearing is approximately retained and the ability to orientate of humans is better than using a microphone.

Mit dem zugehörigen elektronischen Verstärker bieten sich folgende, auch für ein Mikrophon geltende Zusatzmö#glichkeiten: 1. Die Verwendung eines Sondenmikrophons, das bei Bedarf über eine Zuleitung an den Verstärker angeschlossen wird. Es kann mittels einer Stange an eine mit großer Lärmentwicklung laufende Maschine zur Ortung von Fehler verratenden Geräuschen herangeführt werden (z.B.With the associated electronic amplifier, the following are possible Additional options also valid for a microphone: 1. The use of a probe microphone, which is connected to the amplifier via a feed line if required. It can by means of a rod to a machine running with a lot of noise for locating be introduced by noises that reveal errors (e.g.

Motorenprüfstände). Engine test stands).

2. Der Einbau eines selbsttätigen und/oder manuell zu bedienenden Pegelreglers.2. The installation of an automatic and / or manual Level control.

Bei Benutzung eines selbsttätigen Reglers mit geeigneter Ansprechzeit auf z.B. Amplitude und Differentialquotient des Zeitsignals ist die kurzzeitige Abschaltung des Verstärkers bei Vorliegen impulsartiger Lärmspitzen (Pressen, Stanzen, Hammerwerke) möglich. When using an automatic controller with a suitable response time on e.g. amplitude and differential quotient of the time signal is the short-term Switching off the amplifier in the presence of impulsive noise peaks (pressing, punching, Hammer mills) possible.

3. Der Einbau frequenzselektiver Filter.3. The installation of frequency-selective filters.

Mit deren Hilfe können bestimmte Spektralbereiche hoher Leistungsdichte aus dem Lärm ausgefiltert werden, ohne daß die Sprachverständ lichkeit nenneswert leidet. Die Lärmwirkung von Geräuschen mit spektral stark betonten Bereichen (rotierende Maschinen) kann so bei guter Kommunikationsmoglichkeit herabgemindert werden. With their help, certain spectral ranges of high power density can be filtered out of the noise without impairing the intelligibility of speech suffers. The noise effect of noises with spectrally strongly emphasized areas (rotating Machines) can thus be reduced if there is good communication.

Claims (4)

Patentansprüche:Patent claims: Persönlicher Schallschutz zum Einsatz bei lauten Umgebungsgeräuschen, dadurch gekennzeichnet, daß in ihm zwei Mikrophone und ein Zweikanal-Verstärker mit zwei Kopfhörern eingebaut sind.Personal soundproofing for use in loud ambient noises, characterized in that it has two microphones and a two-channel amplifier with two headphones installed. 2. Persönlicher Schallschutz nach Anspruch 1, dadurch gekennzeichnet, daß die Mikrophone die Richtcharakteristik des menschlichen Ohres nachbilden.2. Personal sound insulation according to claim 1, characterized in that that the microphones simulate the directional characteristics of the human ear. 3. Persönlicher Schallschutz nach Anspruch 1, dadurch gekennzeichnet, daß der Verstärker eine Anschlußmöglichkeit für Sondenmikrophone aufweist.3. Personal sound insulation according to claim 1, characterized in that that the amplifier has a connection for probe microphones. 4. Persönlicher Schallschutz nach Anspruch 1, dadurch gekennzeichnet, daß in den Verstärker signalangepaßte Störunterdrückungsglieder eingebaut sind.4. Personal soundproofing according to claim 1, characterized in that that matched interference suppression elements are built into the amplifier.
DE19742460535 1974-12-20 1974-12-20 Personal sound proofing against surrounding noise - having signal adapted interference suppression whilst maintaining aural determination of directions Pending DE2460535A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19742460535 DE2460535A1 (en) 1974-12-20 1974-12-20 Personal sound proofing against surrounding noise - having signal adapted interference suppression whilst maintaining aural determination of directions

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19742460535 DE2460535A1 (en) 1974-12-20 1974-12-20 Personal sound proofing against surrounding noise - having signal adapted interference suppression whilst maintaining aural determination of directions

Publications (1)

Publication Number Publication Date
DE2460535A1 true DE2460535A1 (en) 1976-06-24

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
DE19742460535 Pending DE2460535A1 (en) 1974-12-20 1974-12-20 Personal sound proofing against surrounding noise - having signal adapted interference suppression whilst maintaining aural determination of directions

Country Status (1)

Country Link
DE (1) DE2460535A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996008004A1 (en) * 1994-09-02 1996-03-14 Minnesota Mining And Manufacturing Company Directional ear device with adaptive bandwidth and gain control
WO2018063917A3 (en) * 2016-09-28 2018-05-11 3M Innovative Properties Company Adaptive electronic hearing protection device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996008004A1 (en) * 1994-09-02 1996-03-14 Minnesota Mining And Manufacturing Company Directional ear device with adaptive bandwidth and gain control
US5550923A (en) * 1994-09-02 1996-08-27 Minnesota Mining And Manufacturing Company Directional ear device with adaptive bandwidth and gain control
WO2018063917A3 (en) * 2016-09-28 2018-05-11 3M Innovative Properties Company Adaptive electronic hearing protection device
US11504278B2 (en) 2016-09-28 2022-11-22 3M Innovative Properties Company Adaptive electronic hearing protection device

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