Sound Measurement - Noise

The EC - Directive 2003/10/EC "noise" (17th individual directive on physical agents) [1] dated 6.2.2003 are new and preventive action levels for workplace noise. The national implementation of the directive is on the noise and Vibration OSH Regulation (LärmVibrationsArbSchV) [2] takes place. The UVV "noise" (BGV B3 and B3 GUV-V) [3] is now supported by the accident insurance in force.

1 What is new?
2 How is measured in operation?
3 What information should the report contain?

1 What is new?
The existing preventive measures against noise in the workplace (hearing hazards and increased risks of accidents) are now available from eg 85 dB (A) from 90 dB (A) is required. What is new is the concept of “daily noise exposure level. “
The employer has in the context of the risk assessment pursuant to Section 5 of the OSH Act and § 3 LärmVibrationsArbSchV determine whether employees are exposed to noise or can be. Regarding the noise includes the risk assessment include the identification of
Nature, severity and duration of exposure. The risk assessment is a competent person, such as the specialist for occupational safety
The identification and assessment of the nature, extent and duration of exposure to noise may be the employer of the manufacturer's information or generally accessible information sources, such as comparative literature or from the comparable jobs, operate.
Noise areas are under the Noise Vibration ArbSchV at reaching a daily noise exposure level of 85 dB (A) into law and the proper use of hearing protectors must be ensured. When exceeding the upper exposure noise reduction is a program of technical and organizational measures and implement.

2 How to measure operating?
The measurements must be approved by a competent person with appropriate instrumentation and measurement techniques according to the state of technology, so that a decision on the implementation of values is possible.
The measurements must be kept at least 30 years. From the measurement results are obtained, if necessary, technical and / or noise abatement programs, personal protective equipment necessary (Hearing) and / or offers or the duty to work from medical examinations.
According to EC directives, eg EC directive 2003/10/EC "noise," DIN 45645-2 [4], the ISO 9612 [10] and ISO 1999 [5] are Leitmessverfahren averages in the time of evaluation "fast" and the frequency weighting "A" [6] to measure. The upper part of the sound (pressure) level
is in "peak" and "C" to capture. The average method, therefore, is consistent with the previous procedure UVV "noise" (Section 2 and Appendix 1 BGV B3 or B3-V pattern) to the "noise range" (as evaluation of levels of 85 dB (A)) to determine.
Pulse increments omitted. Designates the value is now a level of daily exposure to noise. The levels of weekly noise exposure, on application by the competent authority in exceptional cases be admitted. Measurements must meet the operational requirements of DIN 45645-2 match. The measurement time is long enough to select the feature
Noise to be recorded. Determining the level of noise exposure requires the recording of the noise characteristics for the corresponding job, ie the noise over the noise level and duration (in part) of the average long-term noise typical load. These informations are used in production processes and machinery related noise is necessary. Interviews with employees and superiors, as well as studies of workflow can be used.
My measurements are not always necessary, because it also can be valued database, literature recognized or similar jobs are used. In any case, to verify that the measured values and the boundary conditions in the workplace situations to be assessed are transferable. The uncertainties should be documented and, for example, according to DIN 45645-2 to treat. Readings and the uncertainties are presented separately. Possibly. inspections are a sample or more measurements or evaluations and statistical techniques useful for the result and reduces uncertainty. The electrode is before and after measurement to check (eg a gauge). In critical cases (eg, potential litigation, security, court proceedings), which calibrates the equipment.

Tages-Lärmexpositionspegel LEX,8h (bisher: Beurteilungspegel LArd)
unterer Auslösewert
80 dB(A)
85 dB(A)
oberer Auslösewert
85 dB(A)
90 dB(A)
Spitzenschalldruckpegel LpC,peak
unterer Auslösewert
135 dB(A)
140 dB
oberer Auslösewert
137 dB(A)
Bei Auswahl und Benutzung von Gehörschützern gelten maximal zulässige Expositionswerte.

* This information was, under the leadership of Dr. - Ing Neugebauer, MMBG, prepared by members of the AK "operating noise pollution" in the specialist machinery, manufacturing systems, steel construction (FA MFS). The FA has, inter alia representatives from BGen, governmental institutions, social partners, manufacturers and operators (BGG sa 900). In this Working Group include representatives of the industries involved as experts for the prevention of health hazards due to noise is enabled.

3 What information contains the report?
In the measurement of the technical content of the surveys, for example, equipment, parts, materials,
special parameters and additional information (eg indicating the sound according to the class HM BGR 194 "use of the audience" [7] and the BGI 5024 hearing of the information "[8]). The latter assist in the selection of personal hearing protectors. Should be recognized when the warning signals in noise, special assessments are necessary to avoid a potential accident risk to cope with excessive light of the warning signs. More details on the implementation of measurements and documentation of the measurements as "Land" is derived from DIN 45645-2 or details about the "noise map" of the DIN EN ISO 11690-1 [9]. Then the "location" measurement values are documented based on personal assessments and preventive measures.
From the measurement results are derived from technical and / or noise abatement programs, the additional personal protective equipment (hearing) and / or the offer or obligation to maintain a health professional with the "BGlichen" BGG 904 - 20 (G Top 20 "noise").
Guidance (previously: the selection criteria) are available as BGI 504-20.

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