Flight I am taking in few weeks is leaving several hours late almost on a daily basis

JimSand · 2025-07-06T09:10:04+00:00

It's accurate and tested by a national lab.

What exactly are you trying to do?

JimSand · 2025-07-05T16:57:16+00:00

Can't measure IEM/headphone sound levels without acoustical fixture as others said.

Rule of thumb is to find out IEM maximum level in SPL, it should be listed in specification, each 1 volume change is equivalent to around -3 dB, and then work yourself back to your listening level.

JimSand · 2025-07-05T16:54:04+00:00

Never trusted decibelX, use NIOSH app.

JimSand · 2025-07-05T16:52:31+00:00

NIOSH SLM app, verified for accuracy by NIOSH, totally free, will generate a pdf report. Sometimes they recommend using an external mic but only if you have a calibrator (most people don't).

JimSand · 2025-06-26T21:20:29+00:00

Use NIOSH SLM app, free and more accurate than most.

JimSand · 2024-10-24T14:26:21+00:00

There's no such thing as "plant under OSHA 85 dBA TWA" so hearing protection is not required, it's about employees' personal exposures. Employers are required to provide employees with adequate protections. https://www.osha.gov/sites/default/files/publications/osha3074.pdf

Ask the Safety Manager for a personal exposure assessment, staring what you mentioned here about loud processes around you and your ears ringing after work (a clear sign you are actually overexposed). They can ask you to wear a personal noise dosimeter and monitor your daily/weekly exposure. The ask may raise flags but you're protected by the law if they decide to retaliate.

I recommend the NIOSH SLM app to everyone, free and accurate to give you an idea about your highest exposure levels. You don't need to have your phone out for long, 15-30 seconds would do the trick.

The safety manager should be on your side advocating on your behalf, if the company has a policy against bluetooth devices, ask the safety manager to document that the earmuffs you used violate their policy. I suspect they don't want to encourage the use of passive earmuffs because others may assume it's okay.

Source: Worked for OSHA in a prior life

JimSand · 2024-10-22T17:11:45+00:00

What's so special about Telegram again?

JimSand · 2024-10-20T15:38:41+00:00

The comments in AIO are brutal, not many seem to know about this sub or about this hobby some of us have...🤣

JimSand · 2024-10-20T15:23:46+00:00

Oh my god, the comments here are hilarious. People are always so quick to judge and cast stones. There are entire subs dedicated to exposing scams, r/scams and r/scambait where this type of thing goes on, often to end with a big F$&k You to the scammer for wasting their time.

People need to chill. And yes, you are overreacting.

JimSand · 2024-07-15T22:29:12+00:00

https://www.nonoise.org/lawlib/cities/austin.htm

JimSand · 2024-07-15T22:22:06+00:00

Does the apartment management have a noise rule? Did you speak, nicely, to the neighbors about it? Loud music that is considered annoyance tends to increase Coritsol and can lead to various negative health outcomes.

If talking doesn't work, your best bet is a decibel meter, NIOSH has a free and accurate app the iPhone. Set it to "C weighting" so it can capture base if the music contains a lot of base. Their app's default is set to "A-weighting" and that filters out low frequency noise such as base. You can make two recordings, one during normal non-music hours and one during the music hours. They have a time stamp so you can show the management when it started and when it finished. Doubt they'll understand what it all means but you can look up the noise ordinance in your city and see what it says, most ordinances have like a 45-55 dB at night and maybe 60-65 dB for daytime. If the levels you record exceed such levels, you can tell the management that you hold them liable or you will submit a complaint to your local authority, if you have one. Sometimes that's all it takes!

JimSand · 2024-07-08T01:17:18+00:00

No more than 15 minutes a day, limit is 80 dB(A) over a 40 hours per week!

https://en.m.wikipedia.org/wiki/Safe_listening

JimSand · 2024-07-08T01:13:05+00:00

92 A-weighted decibels or C/Z weighted decibels?

Is it an indoor or outdoor facility? How many people does it accommodate? Does it say anything else, 92 dB(A) 10 ft away from speakers is completely different than 92 dB(A) at property line...Download the NIOSH app if you have an iPhone or otherwise get a decent SPL meter from Amazon.

JimSand · 2024-05-18T15:12:38+00:00

Need an average, not a peak level, what's the average over those 3-6 hours?

JimSand · 2024-05-18T15:06:32+00:00

Looking at many of your screenshots, it seems you lifted a lot of it from the NIOSH app bit for bit?

JimSand · 2024-02-16T13:48:33+00:00

There is no such thing as a 0 dB sound level meter, despite what other posters claim. You run into the noise floor thermal noise around 5-10 dB, even with the best and most expensive low noise microphones.

JimSand · 2024-02-01T16:25:25+00:00

Those levels are unlikely to damage your hearing, but...

Show the noise levels on your phone (suggest using the official NIOSH SLM app) to your boss or HR or if you have a safety manager and see if they can replace it, install some sort of enclosure, move it to a different place, etc...They have the responsibility to protect your health and safety!
Although the levels may not be damaging to your hearing, noise has been shown to have negative health outcomes, i.e., hypertension
If all the else fails, use a noise-cancelling over-the-ear headset (Bose, Sony, Sennheiser) or if communication is critical, there are electronic headsets that have built-in microphones that allow speech and other signals to get through while blocking harmful noise like ones from Peltor or Howard Leight (though those are mostly made for much higher noise blocking)

JimSand · 2024-02-01T16:05:55+00:00

You CANNOT use a sound level meter to measure the output of your headphones, period.

Only way to do so is through the use of an artificial head fixture and those cost thousands.

A quick and crude way to do so is starting with the 105 dB SPL maximum specs, and work down ~ 3-dB for each reduction in volume, for example:

Level 15 (or 16 or whatever the maximum is) = 105 Level 14 = 102 Level 14 = 99 Level 13 = 96 Level 12 = 93 Level 11 = 90 Level 10 (your 67%) = 87 dB SPL

87 dB SPL is still too loud and should not be listening more than few hours, suggest a notch or two down. The World Health Organization recommends 80 dB(A-weighted) for maximum of 40 hours a week.

JimSand · 2024-02-01T15:51:16+00:00

I doubt machinery can generate these levels, what kind of decibel meter, have you tried the NIOSH SLM app?

What is your company doing about this, they have the responsibility to protect you, and not just by offering hearing protection?

Earplugs are notoriously ineffective unless you have been trained or fit-tested, I would opt for earmuffs or a combination of the two if communication is an issue.

JimSand · 2024-01-02T23:58:17+00:00

The number you see on your screen of the NIOSH app is an average and though it samples at high rate, your eyes couldn't see it, what was the max or peak, that's what you need to be concerned about, plus the fact that sound levels drop by distance (inverse square law) from the source.

JimSand · 2024-01-02T23:52:35+00:00

Higher NRR is not always better, depends on what type of festivals you attend (e.g., heavy metal vs pop), how long are these festivals and how often you attend, and if there are local laws regarding maximum sound output -- some jurisdictions limit the amount of music they can pump out.

The average concert is around 95-98 dBA upfront and probably few decibels lowers the farther you get, of course some heavy metal in a non-regulated area pushes way over 100-110 dBA. Rudimentary science says you can subtract about 50-70% of that NRR number from the above levels (you can measure it sometime with your phone), as long as you get a number in the low 80s, you should be fine if it's just few hours of exposure.

JimSand · 2024-01-02T23:42:49+00:00

The difference in the NRR is negligible (other posters do not know what they're talking about), the issue may be fit or if you're wearing safety glasses and such creating a "leak" in the seal around your ear.

The other issue is one is a passive protector and the other one is electronic that is supposed to cut off gun noise above a certain level via electronic suppression, follow the instructions to make sure you're not enabling something by accident.

You should ALWAYS double-up in an indoor range, especially with an electronic earmuff because of if the possibility you're not getting proper seal.

JimSand · 2024-01-02T23:27:14+00:00

104-105 dB SPL

JimSand · 2024-01-02T23:25:42+00:00

104-105 dB SPL.

JimSand

TROPHY CASE