SIST EN 352-6:2021
(Main)Hearing protectors - Safety requirements - Part 6: Earmuffs with safety-related audio input
Hearing protectors - Safety requirements - Part 6: Earmuffs with safety-related audio input
This European Standard is applicable to earmuffs supplemented by a safety-related audio input. It specifies requirements on construction, design, performance, marking and user information related to the inclusion of the safety-related audio input.
Gehörschützer - Sicherheitstechnische Anforderungen und Prüfungen - Teil 6: Kapselgehörschützer mit Kommunikationseinrichtungen
Dieses Dokument ist anzuwenden für Kapselgehörschützer mit sicherheitsrelevantem Audioinput. Das Audiosignal kann über einen elektrischen Eingang oder andere Kommunikationssysteme, wie Bluetooth , übertragen werden. Es legt für die Integration des sicherheitsrelevanten Audioinputs Anforderungen hinsichtlich Konstruktion, Gestaltung, Leistung, Kennzeichnung und Benutzerinformationen fest.
Kapselgehörschützer mit sicherheitsrelevantem Audioinput haben die Aufgabe, Sprachinformationen und Warnsignale wiederzugeben während Umgebungsgeräusche gedämmt werden. Sie können in einer ganzen Reihe von Arbeitssituationen Verwendung finden, z. B. im Bereich der Flugkommunikation, bei der Polizei sowie in der Rundfunk- und Unterhaltungsindustrie.
Protecteurs individuels contre le bruit - Exigences de sécurité et essais - Partie 6 : Serre-tête avec entrée audio
La présente Norme européenne est applicable aux serre-tête avec en supplément une entrée audio dédiée à la sécurité. Elle spécifie les exigences en matière de construction, de conception, de performances et de marquage ainsi que les informations destinées à l’utilisateur pour ce qui concerne l’incorporation de l'entrée audio dédiée à la sécurité.
Varovala sluha - Varnostne zahteve - 6. del: Naušniki z varnostnim avdio vhodom
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-april-2021
Nadomešča:
SIST EN 352-6:2003
Varovala sluha - Varnostne zahteve - 6. del: Naušniki z varnostnim avdio vhodom
Hearing protectors - Safety requirements - Part 6: Earmuffs with safety-related audio
input
Gehörschützer - Sicherheitstechnische Anforderungen und Prüfungen - Teil 6:
Kapselgehörschützer mit Kommunikationseinrichtungen
Protecteurs individuels contre le bruit - Exigences de sécurité et essais - Partie 6 : Serre-
tête avec entrée audio
Ta slovenski standard je istoveten z: EN 352-6:2020
ICS:
13.340.20 Varovalna oprema za glavo Head protective equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 352-6
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2020
EUROPÄISCHE NORM
ICS 13.340.20 Supersedes EN 352-6:2002
English Version
Hearing protectors - Safety requirements - Part 6:
Earmuffs with safety-related audio input
Protecteurs individuels contre le bruit - Exigences de Gehörschützer - Sicherheitstechnische Anforderungen
sécurité et essais - Partie 6 : Serre-tête avec entrée und Prüfungen - Teil 6: Kapselgehörschützer mit
audio Kommunikationseinrichtungen
This European Standard was approved by CEN on 18 June 2018.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 352-6:2020 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Requirements . 6
4.1 General . 6
4.2 Sound output levels and criterion input signal . 6
5 Marking . 6
6 Manufacturer's instructions and information . 6
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of Regulation (EU) 2016/425 of the European Parliament and of the
Council of 9 March 2016 on personal protective equipment aimed to be covered. 8
Bibliography . 9
European foreword
This document (EN 352-6:2020) has been prepared by Technical Committee CEN/TC 159 “Hearing
protectors”, the secretariat of which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by May 2021, and conflicting national standards shall be
withdrawn at the latest by November 2023.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 352-6:2002.
This document has been prepared under a standardization request given to CEN by the European
Commission and the European Free Trade Association, and supports essential requirements of
EU Regulation(s).
For relationship with EU Regulation(s), see informative Annex ZA, which is an integral part of this
document.
In comparison with the previous edition, the following technical modifications have been made:
Clause/Paragraph/Table/Figure Change
removed, reference to EN 13819-3:2019 7.5.1 and 7.6.1
Clause 5
added
Annex A removed
removed, reference to EN 13819-3:2019 7.5.1 and 7.6.1
Annex B
added
NOTE 1 The technical changes referred to include the significant technical changes from the EN revised but
is not an exhaustive list of all modifications from the previous edition.
NOTE 2 The modifications include previously issued guidance documents according to Article 24 §11 in the
EU Regulation (EU) 2016/425 on personal protective equipment. No changes have been made to minimum
safety requirements. The modifications do not affect the state of art of the product requirements for these
products.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Introduction
The requirements of the standard are concerned with the safety-related audio input performance of the
earmuffs. Sound output levels and criterion input signals are reported in the user information.
EN 352-6 is part of a family of standards describing product requirements:
— EN 352-1, Hearing protectors — General requirements — Part 1: Earmuffs
— EN 352-2, Hearing protectors — General requirements — Part 2: Earplugs
— EN 352-3, Hearing protectors — General requirements — Part 3: Earmuffs attached to head
protection and/or face protection devices
— EN 352-4, Hearing protectors — Safety requirements — Part 4: Level-dependent earmuffs
— EN 352-5, Hearing protectors — Safety requirements — Part 5: Active noise reduction earmuffs
— EN 352-6, Hearing protectors — Safety requirements — Part 6: Earmuffs with safety-related audio
input
— EN 352-7, Hearing protectors — Safety requirements — Part 7: Level-dependent earplugs
— EN 352-8, Hearing protectors — Safety requirements — Part 8: Entertainment audio earmuffs
— EN 352-9, Hearing protect
...
SLOVENSKI STANDARD
01-april-2021
Nadomešča:
SIST EN 352-6:2003
VVarovala sluha - Varnostne zahteve - 6. del: Naušniki z varnostnim avdio vhodom
Hearing protectors - Safety requirements - Part 6: Earmuffs with safety-related audio
input
Gehörschützer - Sicherheitstechnische Anforderungen und Prüfungen - Teil 6:
Kapselgehörschützer mit Kommunikationseinrichtungen
Protecteurs individuels contre le bruit - Exigences de sécurité et essais - Partie 6 : Serre-
tête avec entrée audio
Ta slovenski standard je istoveten z: EN 352-6:2020
ICS:
13.340.20 Varovalna oprema za glavo Head protective equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 352-6
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2020
EUROPÄISCHE NORM
ICS 13.340.20 Supersedes EN 352-6:2002
English Version
Hearing protectors - Safety requirements - Part 6:
Earmuffs with safety-related audio input
Protecteurs individuels contre le bruit - Exigences de Gehörschützer - Sicherheitstechnische Anforderungen
sécurité et essais - Partie 6 : Serre-tête avec entrée und Prüfungen - Teil 6: Kapselgehörschützer mit
audio Kommunikationseinrichtungen
This European Standard was approved by CEN on 18 June 2018.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 352-6:2020 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Requirements . 6
4.1 General . 6
4.2 Sound output levels and criterion input signal . 6
5 Marking . 6
6 Manufacturer's instructions and information . 6
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of Regulation (EU) 2016/425 of the European Parliament and of the
Council of 9 March 2016 on personal protective equipment aimed to be covered. 8
Bibliography . 9
European foreword
This document (EN 352-6:2020) has been prepared by Technical Committee CEN/TC 159 “Hearing
protectors”, the secretariat of which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by May 2021, and conflicting national standards shall be
withdrawn at the latest by November 2023.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 352-6:2002.
This document has been prepared under a standardization request given to CEN by the European
Commission and the European Free Trade Association, and supports essential requirements of
EU Regulation(s).
For relationship with EU Regulation(s), see informative Annex ZA, which is an integral part of this
document.
In comparison with the previous edition, the following technical modifications have been made:
Clause/Paragraph/Table/Figure Change
removed, reference to EN 13819-3:2019 7.5.1 and 7.6.1
Clause 5
added
Annex A removed
removed, reference to EN 13819-3:2019 7.5.1 and 7.6.1
Annex B
added
NOTE 1 The technical changes referred to include the significant technical changes from the EN revised but
is not an exhaustive list of all modifications from the previous edition.
NOTE 2 The modifications include previously issued guidance documents according to Article 24 §11 in the
EU Regulation (EU) 2016/425 on personal protective equipment. No changes have been made to minimum
safety requirements. The modifications do not affect the state of art of the product requirements for these
products.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Introduction
The requirements of the standard are concerned with the safety-related audio input performance of the
earmuffs. Sound output levels and criterion input signals are reported in the user information.
EN 352-6 is part of a family of standards describing product requirements:
— EN 352-1, Hearing protectors — General requirements — Part 1: Earmuffs
— EN 352-2, Hearing protectors — General requirements — Part 2: Earplugs
— EN 352-3, Hearing protectors — General requirements — Part 3: Earmuffs attached to head
protection and/or face protection devices
— EN 352-4, Hearing protectors — Safety requirements — Part 4: Level-dependent earmuffs
— EN 352-5, Hearing protectors — Safety requirements — Part 5: Active noise reduction earmuffs
— EN 352-6, Hearing protectors — Safety requirements — Part 6: Earmuffs with safety-related audio
input
— EN 352-7, Hearing protectors — Safety requirements — Part 7: Level-dependent earplugs
— EN 352-8, Hearing protectors — Safety requirements — Part 8: Entertainment audio earmuffs
— EN 352-9, Hearing protec
...
Frequently Asked Questions
SIST EN 352-6:2021 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Hearing protectors - Safety requirements - Part 6: Earmuffs with safety-related audio input". This standard covers: This European Standard is applicable to earmuffs supplemented by a safety-related audio input. It specifies requirements on construction, design, performance, marking and user information related to the inclusion of the safety-related audio input.
This European Standard is applicable to earmuffs supplemented by a safety-related audio input. It specifies requirements on construction, design, performance, marking and user information related to the inclusion of the safety-related audio input.
SIST EN 352-6:2021 is classified under the following ICS (International Classification for Standards) categories: 13.340.20 - Head protective equipment. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 352-6:2021 has the following relationships with other standards: It is inter standard links to SIST EN 352-6:2003, SIST EN 352-6:2021+A1:2024, SIST EN 352-6:2021/kprA1:2024. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
SIST EN 352-6:2021 is associated with the following European legislation: EU Directives/Regulations: 2016/425, 89/686/EEC, 93/68/EEC, 93/95/EEC, 96/58/EC; Standardization Mandates: M/031, M/571. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
You can purchase SIST EN 352-6:2021 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of SIST standards.
SIST EN 352-6:2021은 안전 관련 오디오 입력이 있는 이어머프에 대한 유럽 표준으로, 이 표준은 이어머프의 구조, 디자인, 성능, 마킹 및 사용자 정보와 관련된 요구사항을 명시합니다. 이 문서는 특히 안전 관련 오디오 입력이 포함된 이어머프의 개발 및 제조에 필요한 기준을 제공하여 사용자 안전을 극대화합니다. 표준의 범위는 매우 포괄적이며, 이어머프의 성능을 보장하기 위한 다양한 테스트와 평가 방법에 대한 지침을 포함합니다. 이를 통해 제조업체는 제품이 진정으로 안전하며, 실제 사용 시 필요한 기능을 잘 수행할 수 있도록 하는 데 필요한 정보를 얻을 수 있습니다. 이러한 요구사항을 설정함으로써, SIST EN 352-6:2021은 산업 현장에서 효과적인 청력 보호를 보장하며, 각종 음향 환경에서 사용자의 귀를 보호하기 위한 필수 조건을 충족하는 데 중요한 역할을 합니다. 이 표준의 강점 중 하나는 명확하고 구체적인 마킹 및 사용자 정보 제공 지침이 포함되어 있다는 점입니다. 이는 사용자가 자신의 안전을 위해 필요한 정보를 쉽게 이해하고 접근할 수 있도록 지원하며, 제품의 안전성과 기능성을 강조합니다. 따라서 이 표준을 준수하는 제품은 사용자에게 신뢰성을 제공하며, 실제 작업 환경에서의 안전사고를 예방하는 데 기여할 수 있습니다. 결과적으로, SIST EN 352-6:2021은 안전 관련 오디오 입력이 있는 이어머프의 설계 및 제조에 있어 필수적인 기준으로서, 사용자 안전과 제품의 성능 보장을 위한 중요한 역할을 하고 있습니다. 이 표준을 따르는 제조업체는 시장에서의 경쟁력을 높이며, 소비자에게 보다 신뢰할 수 있는 제품을 제공할 수 있는 기회를 갖게 됩니다.
SIST EN 352-6:2021 は、安全に関連するオーディオ入力を備えた耳あてのための欧州標準であり、その範囲は非常に重要です。この標準は、耳あての構造、デザイン、性能、マーキング、及び安全関連のオーディオ入力の包含に関するユーザー情報を明確に定義しています。このように、耳あての安全基準を詳細に規定していることから、労働現場や騒音の多い環境において作業者の聴覚を保護しつつ、安全に音声情報を受信できる技術が求められる中で、非常に関連性の高い標準です。 主な強みとしては、耳あての設計と性能に関する具体的な要求事項が提示されている点が挙げられます。これにより、製造業者は安全性と快適性を兼ね備えた製品を開発するための基準を持つことができます。また、マーキングやユーザー情報に関する要求が含まれていることで、使用者は耳あての適切な使用法を理解しやすくなります。このように、SIST EN 352-6:2021は、作業者の安全を保証するだけでなく、コミュニケーションの向上にも寄与する点で優れた標準です。 この標準の導入は、製品の信頼性を向上させるとともに、使用者の安全を確保する上で不可欠であり、安全関連オーディオ入力を具備している耳あての製造における最良の実践を促進します。以上の理由から、SIST EN 352-6:2021は、耳あての安全要件として非常に重要な役割を果たすことが明確です。
Le document SIST EN 352-6:2021, concernant les protecteurs auditifs - Exigences de sécurité - Partie 6 : Casques avec entrée audio liée à la sécurité, établit des normes essentielles pour les casques dotés d’une entrée audio. Le champ d’application de cette norme est crucial, car il couvre non seulement la conception et la construction des casques, mais également les exigences de performance, de marquage et d’information à destination des utilisateurs dans le contexte d’une entrée audio spécifiquement liée à la sécurité. Les points forts de cette norme incluent sa capacité à équilibrer protection auditive et communication, s’adaptant ainsi à des environnements où la sécurité sonore est primordiale. Les exigences claires concernant la construction et le design garantissent que les équipements respectent des standards élevés tout en intégrant des fonctionnalités supplémentaires conçues pour ne pas compromettre la sécurité. La spécification des performances permet également d’assurer une évaluation objective des produits sur le marché, renforçant la confiance des utilisateurs. La pertinence de la norme SIST EN 352-6:2021 est particulièrement notable à une époque où les préoccupations liées à la sécurité au travail et à la santé auditive sont en constante augmentation. En intégrant des fonctionnalités audio, cette norme permet aux utilisateurs de rester connectés tout en étant protégés des bruits nocifs, favorisant ainsi un environnement de travail plus sécurisé et plus efficace. En somme, cette norme répond à un besoin croissant pour des solutions innovantes qui allient sécurité et praticité, rendant son adoption et sa mise en œuvre non seulement recommandables, mais également nécessaires.
The SIST EN 352-6:2021 standard provides essential guidelines for hearing protectors, specifically earmuffs that include a safety-related audio input. This standard is particularly relevant in environments where noise exposure is a concern, and it allows users to maintain auditory situational awareness while still being protected from harmful noise levels. One of the key strengths of the standard is its comprehensive approach to safety requirements. By detailing specifications on construction, design, and performance, the standard ensures that earmuffs are not only effective in providing hearing protection but also meet the necessary safety protocols when audio input is integrated. This makes the earmuffs suitable for use in various industries, including construction, manufacturing, and other occupational settings where communication and environmental sounds are crucial. The emphasis on marking and user information within the standard enhances its utility, ensuring that users receive adequate guidance on the correct usage and limitations of the earmuffs. Clear labeling and user instruction are vital for maximizing the effectiveness of safety equipment, and this standard addresses that need effectively. Moreover, the standard's relevance extends beyond manufacturing and design; it aligns with the broader initiatives aimed at improving occupational safety and health practices. The inclusion of audio input safety requirements reflects a growing recognition of the importance of dual functionality in personal protective equipment, allowing for both protection and communication. In summary, SIST EN 352-6:2021 stands out for its methodical and thorough stipulations that enhance both the safety and usability of earmuffs with safety-related audio inputs, making it a critical standard in the field of hearing protection.
Die Norm SIST EN 352-6:2021 behandelt Gehörschutzmittel, die mit einem sicherheitsrelevanten Audioeingang ausgestattet sind, und legt damit einen wichtigen Standard für die Sicherheit und den Schutz des Gehörs fest. Der Anwendungsbereich dieser Norm umfasst speziell die Konstruktion, das Design und die Leistung von Ohrenschützern, die mit einem Audioeingang kombiniert sind, der auf Sicherheit ausgelegt ist. Diese Eigenschaften machen die Norm besonders relevant für die Bereiche, in denen Arbeitsschutz und Hörgesundheit von größter Bedeutung sind. Ein herausragendes Merkmal der SIST EN 352-6:2021 ist die umfassende Definition der Anforderungen an die Konstruktion und das Design von Ohrenschützern. Die Bestimmungen berücksichtigen nicht nur die akustischen Eigenschaften, sondern auch die ergonomischen Aspekte, die für die Benutzerfreundlichkeit und den Tragekomfort entscheidend sind. Damit wird sichergestellt, dass die Earmuffs nicht nur effektiv vor Lärmeinwirkung schützen, sondern auch im Alltag eingesetzt werden können, ohne das Wohlbefinden des Trägers zu beeinträchtigen. Darüber hinaus legt die Norm spezifische Anforderungen an die Leistung fest, die gewährleisten, dass der sicherheitsrelevante Audioeingang ordnungsgemäß funktioniert, ohne die schützende Funktion der Ohrenschützer zu mindern. Diese ausgewogene Herangehensweise stellt sicher, dass Anwender sowohl den Schutz vor schädlichem Lärm als auch die Möglichkeit zur Kommunikation oder das Hören von Warnsignalen haben, was in vielen industriellen und arbeitsrechtlichen Kontexten von entscheidender Bedeutung ist. Ein weiterer wichtiger Aspekt ist die klare Kennzeichnung und die bereitgestellten Nutzerinformationen, die in der Norm festgelegt sind. Durch die Vorgaben zur Markierung wird sichergestellt, dass Nutzer genau informiert sind über die Funktionen und die Sicherheit der Produkte, die sie verwenden. Dies fördert nicht nur das Bewusstsein für die Anwendung dieser Earmuffs, sondern trägt auch zur Verbreitung der Norm bei. Insgesamt zeigt die SIST EN 352-6:2021 klare Stärken in ihrer Fähigkeit, Sicherheitsanforderungen für Ohrenschützer mit einem Audioeingang zu definieren, wobei sowohl die Benutzerfreundlichkeit als auch der Schutz im Fokus stehen. Die Relevanz dieser Norm ist unbestritten, insbesondere für Branchen, in denen Lärmschutz und die Aufrechterhaltung der Kommunikation gleichzeitig erforderlich sind.










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