Safety guides · 17 guides on hearing
Hearing guides
Plain words first, the standard cited under it, and the products that carry the rating with live prices. 17 guides, each with the question people type as its heading. Bayshore Safety, industrial safety and PPE supplier since 2017.
Audiometric testing: what 1910.95(g) requiresAudiometric testing is the annual hearing check OSHA requires for every employee whose 8-hour average noise exposure is 85 dBA or more.29 CFR 1910.95(g), (h), (i), (j), (m) and Appendices C, D, E, F (current e-CFR)Banded ear plugs: when they are the right choiceBanded ear plugs are two soft pods on a plastic band that presses them into the ear canal openings.29 CFR 1910.95(i), (j) and Appendix B (current e-CFR); NIOSH Publication 98-126 (1998), chDecibel level chart: how loud common sounds and tools are, and how many decibels cause hearing damageHearing damage starts with time at level, not a single number.29 CFR 1910.95 Table G-16 (current e-CFR); NIOSH Noise and Hearing Loss (REL 85 dBA, 3-dB Double hearing protection: when to wear plugs and muffs togetherWear ear plugs and earmuffs at the same time when the 8-hour average noise exposure goes past 100 dBA.29 CFR 1910.95(j) and Appendix B (current e-CFR); NIOSH Publication 98-126 (1998), sectionEar plugs vs earmuffs: which gives more protection?On the label, ear plugs.29 CFR 1910.95(i), (j) and Appendix B (current e-CFR); NIOSH Publication 98-126 (1998); OSElectronic and level-dependent earmuffs: how they workAn electronic, or level-dependent, earmuff is a passive earmuff with a microphone on the outside of each cup, an amplifier and a small speaker inside.EN 352-4 (level-dependent earmuffs) as summarized by JSP; 29 CFR 1910.95(j) and Appendix BHearing protection with a hard hat: cap-mounted earmuffsA cap-mounted earmuff is an earmuff whose arms clip into the accessory slots on the sides of a cap-style hard hat, so the hat holds the cups against the ears instead of a headband.ANSI/ISEA Z89.1 (industrial head protection), as incorporated by 29 CFR 1910.135(b); 29 CFHow loud is 85 decibels, and why is it the number that matters?85 decibels is about as loud as heavy traffic from the sidewalk, a kitchen blender across the room, or a gas lawn mower from 25 feet: loud enough that you raise your voice to talk to someone an arm’s length away.29 CFR 1910.95 (Table G-16, paragraphs (b) and (c)); NIOSH Criteria for a Recommended StanHow often should hearing protection be replaced?It depends on the type, and the makers publish the intervals.29 CFR 1910.95(i)(1) (current e-CFR); manufacturer care instructions (3M, Cleaning and InsHow to insert foam ear plugs correctly (roll, pull, hold)Roll the foam plug between your fingers into a thin, crease-free cylinder.29 CFR 1910.95(i); NIOSH roll-pull-hold guidance; manufacturer instructionsNoise in construction: how 1926.52 differs from 1910.95Construction sites follow 29 CFR 1926.52 and 1926.101, not 1910.95.29 CFR 1926.52 and 1926.101; 29 CFR 1910.95 (current e-CFR)NRR vs SNR: the US and European hearing protector ratings, and why the same plug has two numbersNRR and SNR are both single-number ratings of how much a hearing protector reduces noise in a laboratory test, and they are not interchangeable.40 CFR Part 211 Subpart B; ANSI S3.19-1974; EN 352-1 and 352-2; ISO 4869-1 and 4869-2; 29 OSHA hearing protection requirements explained (1910.95)OSHA’s general industry noise standard, 29 CFR 1910.95, does two things.29 CFR 1910.95 (current e-CFR), Table G-16, Appendices A through GReusable vs disposable ear plugs: how the ratings and care differDisposable ear plugs are slow-recovery foam: you roll them thin, slide them in and they expand to fill the canal.29 CFR 1910.95(i) and Appendix B (current e-CFR); NIOSH Publication 98-126 (1998); manufacWhat is a hearing conservation program, and when is it required?A hearing conservation program is the set of things OSHA makes an employer do once noise reaches an 8-hour average of 85 decibels (dBA) for any employee: measure the noise, test everyone’s hearing every year against a ba29 CFR 1910.95 (current e-CFR); 29 CFR 1926.52(d)What is NRR, and how do you calculate the protection you actually get?NRR is the Noise Reduction Rating, a single number on every hearing protector sold in the United States, in decibels, from an EPA-required lab test: NRR 33 means the lab measured 33 dB of reduction on trained subjects wi40 CFR 211 Subpart B (EPA labeling); 29 CFR 1910.95 Appendix B; OSHA Technical Manual III-When is hearing protection required? The OSHA 85 and 90 dB rulesOSHA has two numbers, and they do different jobs.29 CFR 1910.95 (current e-CFR), Table G-16; 29 CFR 1926.52 and 1926.101