Do hearing protectors count toward the limit?

01What the directive actually says

Article 3 of Directive 2003/10/EC sets three values for daily noise exposure, L_EX,8h, each paired with a peak sound pressure expressed in pascals: a lower exposure action value of 80 dB(A), an upper exposure action value of 85 dB(A), and an exposure limit value of 87 dB(A).

Article 3(2) is the sentence that matters here, and it draws a line straight through the middle of that list. When applying the exposure limit value, the worker's effective exposure must take account of the attenuation provided by the hearing protectors actually worn. The action values, by contrast, "shall not take account of the effect of any such protectors."

So the three values are not three rungs of one ladder. Two of them describe what the workplace is doing to the person. The third describes what reaches the eardrum after the protectors have done their work. They are measured on different bases and answer different questions.

02Getting it backwards fails in both directions

This is not a technicality with one safe side to err on.

Count the protectors toward the upper action value and you under-report. Reaching 85 dB(A) is what obliges an employer to make protection mandatory, mark the area, and provide hearing checks. If you credit the protectors before that test, exposure looks lower than it is, the threshold is never reached on paper, and none of those duties start.

Ignore the protectors at the limit value and you over-restrict. A reading above 87 dB(A) at the ear, unprotected, is common and lawful. It becomes a breach only if it is still above the limit after attenuation. Declare it a breach on the unprotected figure and you will stop work that was compliant, and spend credibility you will want later.

03Your ceiling is probably not 87

The directive sets minimum requirements. Member states may go further, and several have. If you work in Germany or Poland, the number you were taught in an English-language course is not the number in your law.

Peak values in the directive are given in pascals; the dB(C) equivalents are shown for comparison. National instruments are linked in full at the end of this page.

Germany: the same number, twice, meaning two different things

Germany is the case worth slowing down for. The 85 dB(A) upper trigger value in § 6 is assessed with the damping effect of hearing protection expressly excluded. The maximum permissible exposure value in § 8 is also 85 dB(A) — but that one is assessed with the protectors counted.

One number, two opposite bases, two paragraphs apart. And because Germany set its ceiling at 85 rather than the directive's 87, a practitioner working from an English-language source is 2 dB wrong in the permissive direction. On peak, Germany's ceiling is 137 dB(C) against the directive's 140.

Poland: no with-protection number in the law

Poland's structure is different again. The action threshold, próg działania, sits at 80 dB. The ceiling is the NDN — the maximum permissible intensity — at 85 dB for L_EX,8h, alongside 115 dB maximum A-weighted level and 135 dB(C) peak. The action threshold is defined expressly without the effect of personal protective equipment.

The NDN then does two jobs, which is what makes Poland easy to get wrong. Compared against measurements taken in the work environment, reaching or exceeding it is what obliges the employer to enforce protector use and mark the area. Separately, § 9.1 provides that a worker's individual exposure must not exceed the NDN — and § 2 defines individual exposure as the level reached after the attenuation achieved by personal protective equipment.

So protectors do count in Poland. They count against the same 85 dB figure, on a second and separate test. The under-the-protector target of 80 dB often quoted alongside it is a selection criterion from PN-EN 458, a standard rather than the regulation. The 115 dB maximum A-weighted level has no counterpart in the directive at all.

04What this means for a calculator

Halo HSE, and the free calculator on this site, compute daily exposure at the ear disregarding hearing protection. That is the correct basis for the lower and upper action values, for Poland's próg działania, and for the environmental NDN comparison. It is not the basis for the directive's 87 dB(A) exposure limit value, for Germany's 85 dB(A) maximum permissible exposure value, or for Poland's § 9.1 individual-exposure test.

So the result can tell you that unprotected exposure sits above 87 dB(A). It cannot tell you the exposure limit value has been breached, because that assessment includes protectors we know nothing about. Peak sound pressure is not calculated at all — it is a separate measurement with its own limits.

Those boundaries are printed in the app, on screen, where you would see them rather than in a footnote.

Work out a daily exposure in the browser, free and with nothing sent anywhere, or get Halo HSE for iOS to keep dated assessments with a change history and export them as a signed PDF.

05Sources

1. Directive 2003/10/EC, Article 3 Exposure limit values and exposure action values, and the rule on protector attenuation. eur-lex.europa.eu
2. Lärm- und Vibrations-Arbeitsschutzverordnung, 6 March 2007, § 6 and § 8 German trigger values and the maximum permissible exposure value. gesetze-im-internet.de
3. Darbuotojų apsaugos nuo triukšmo keliamos rizikos nuostatai, A1-103/V-265, 15 April 2005 Lithuanian lower, upper and limit exposure values. e-seimas.lrs.lt
4. Rozporządzenie MRPiPS z dnia 12 czerwca 2018 r., Dz.U. 2018 poz. 1286 Polish NDN values for noise. isap.sejm.gov.pl
5. Rozporządzenie MGiP z dnia 5 sierpnia 2005 r., Dz.U. 2005 nr 157 poz. 1318 Polish action thresholds and employer duties for noise and mechanical vibration. isap.sejm.gov.pl

This guide is written for competent persons and is not legal advice. Where a figure has a regulatory source it is named above, so you can cite the instrument rather than this page. If you believe something here is wrong, tell us — corrections are published with the date they were made.