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 directionsInfo
- 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
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS 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
- A61F11/00—Methods 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
- A61F11/06—Protective devices for the ears
- A61F11/14—Protective devices for the ears external, e.g. earcaps or earmuffs
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS 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
- A61F11/00—Methods 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
- A61F11/06—Protective devices for the ears
- A61F11/14—Protective devices for the ears external, e.g. earcaps or earmuffs
- A61F11/145—Protective 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
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)
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
ID=5934094
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)
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 |
-
1974
- 1974-12-20 DE DE19742460535 patent/DE2460535A1/en active Pending
Cited By (4)
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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