{"id":7583,"date":"2026-07-27T11:57:39","date_gmt":"2026-07-27T11:57:39","guid":{"rendered":"https:\/\/sta-group.de\/massnahmen-gegen-laerm-am-arbeitsplatz\/"},"modified":"2026-08-04T08:01:59","modified_gmt":"2026-08-04T08:01:59","slug":"workplace-noise-and-the-order-in-which-measures-actually-apply","status":"publish","type":"post","link":"https:\/\/sta-group.de\/en\/workplace-noise-and-the-order-in-which-measures-actually-apply\/","title":{"rendered":"Workplace noise and the order in which measures actually apply","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

When a hall gets too loud, almost no site reaches for an enclosure first. A box of ear defenders is on the shelf faster, and it is visible at the next inspection. Legally, though, it is the last step, not the first.<\/p>\n

<\/p>\n

Why hearing protection so often comes first instead of last<\/h2>\n

A box of ear defenders arrives the same day, costs little per head and is immediately visible during an audit. A machine enclosure needs a survey, a budget and, in the worst case, a production stop. The quick route therefore wins almost every time, even though it is the weakest one.<\/strong><\/p>\n

Behind that sits a mistake with consequences. Damping the level at the ear does not reduce workplace noise, it only shields one individual from it. The colleague at the next bench, the maintenance stand-in and the visitor from quality assurance all remain in the same sound field.<\/p>\n

There is a second point. Workplace noise does not disappear because nobody can hear it any more, it stays in the room as a load. That is precisely why the law sets out a binding order rather than a recommendation.<\/strong><\/p>\n

Which measures the law asks for first<\/h2>\n

Directive 2003\/10\/EC leaves little room for interpretation. Risks arising from exposure to noise have to be eliminated at source or reduced to a minimum<\/strong>, and technical measures take precedence over organisational ones. Both come before hearing protection. In the United Kingdom the same logic sits in the Control of Noise at Work Regulations 2005, in Germany in the Noise and Vibration Occupational Health and Safety Ordinance. Control of workplace noise therefore starts at the machine, not at the ear.<\/p>\n

Engineering before organisation before the person<\/h3>\n

In English-language health and safety practice this is the hierarchy of control. Elimination, substitution, engineering controls, administrative controls and personal protective equipment, in that order.<\/p>\n

Each level attacks the problem at a different point, from the source to the ear. PPE only comes into play once the levels above it have been exhausted<\/strong> and a residual risk still remains.<\/p>\n\n\n\n\n\n\n\n\n
Level<\/th>\nPoint of attack<\/th>\nExample from production<\/th>\nBasis<\/th>\n<\/tr>\n<\/thead>\n
Elimination and substitution<\/td>\nremove or replace the source<\/td>\nreplace riveting with an adhesive joint<\/td>\nDirective 2003\/10\/EC, Art. 5<\/td>\n<\/tr>\n
Engineering<\/td>\nreduce emission at source and along the path<\/td>\nenclose a press, screen a test bench<\/td>\nDirective 2003\/10\/EC, Art. 5<\/td>\n<\/tr>\n
Administrative<\/td>\nlimit the duration of exposure<\/td>\nshift planning, maintenance, quiet areas<\/td>\nDirective 2003\/10\/EC, Art. 5<\/td>\n<\/tr>\n
Personal<\/td>\ncover the residual risk at the ear<\/td>\near defenders, custom moulded plugs<\/td>\nDirective 2003\/10\/EC, Art. 6<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

What state of the art means in practice<\/h3>\n

This ranking is not a special rule for acoustics. It follows the general principle of combating hazards at source that runs through European occupational safety law as a whole.<\/p>\n

Reducing occupational noise is therefore one of the hazards that has to be addressed technically first. Skip that check and go straight to protective equipment, and a gap remains in your noise risk assessment<\/strong>, because the reasoning behind each chosen level belongs on record.<\/p>\n

The levels at which you actually have to act<\/h2>\n

The lower exposure action value sits at a daily noise exposure level of 80 dB(A), the upper at 85 dB(A). For short, very loud events, peak sound pressure levels of 135 and 137 dB(C) apply on top. Above those sits an exposure limit value of 87 dB(A) that must not be exceeded at all. Where the site stands against these figures only becomes clear through proper workplace noise measurement<\/a>, not through estimates.<\/p>\n

One detail is regularly overlooked. The exposure action values are determined explicitly without the attenuation of any hearing protector.<\/strong> A hall formally remains a noise zone no matter how well the issued ear defenders perform. Only for the exposure limit value is the protector’s attenuation taken into account.<\/p>\n

Once the upper action value is exceeded, workplace noise brings further duties with it. Noise zones have to be marked and demarcated, and only people wearing suitable protection may enter. In parallel, a programme of technical and organisational measures is required. Above 85 dB(A) the engineering route stops being an option and becomes an obligation.<\/strong><\/p>\n

Do hearing protectors count towards the assessment?<\/h3>\n

For the action values, no. The rules are explicit that the attenuation of personal hearing protection is disregarded when the exposure action values are determined. What counts is the level reaching the person without protective equipment. Hearing protection lowers the risk for the wearer, but it does not change how acceptable noise levels in the workplace are assessed in law.<\/p>\n

What engineering noise control actually delivers<\/h2>\n

A proven framework comes from DIN EN ISO 11690<\/a> with its three points of attack, source, path and receiver. Intervening at the source stays the most effective, because the level then drops for everyone in the vicinity. For workplace noise reduction that means quietening the machine first and treating the room afterwards.<\/p>\n

Enclose the source instead of damping at the ear<\/h3>\n

The standard case in industry is enclosure. A closed housing shuts the loud machine in rather than shutting people out. It works around the clock, with no wearing discipline, no briefing and no argument on the early shift.<\/strong> How far this can be taken is shown by our machine enclosures<\/a>, which we design to the millimetre around existing equipment.<\/p>\n

Not every source can be fully enclosed. As soon as material is fed in, a workpiece is changed or a machine is operated continuously, openings remain. Acoustic locks, insulated doors and partly movable elements then do the rest of the work. Even partial enclosure noticeably reduces the level, provided it is properly planned.<\/p>\n

Screening the path and refuges for people<\/h3>\n

Where the source has to stay open, the second point of attack applies. Acoustic barriers and screens intercept the direct component before it spreads through the hall. Room acoustic measures on ceilings and walls come in addition, reducing reverberation rather than emission.<\/p>\n

The third point protects the person inside the room. Control rooms, supervisor offices and acoustic booths create a quiet zone wherever people speak, monitor or document. What counts is the combination<\/strong>, and a single building block rarely carries a site on its own.<\/p>\n

The three points of attack at a glance:<\/p>\n