freds_got_slacks
freds_got_slacks t1_j9bbn6t wrote
Reply to comment by aecarol1 in ‘We found the Artemis-I noise level at 5 km had a crackling quality about 40 million times greater than a bowl of Rice Krispies.’ — Maximum noise measured during Artemis-I launch on 16 Nov. 2022 was higher than predicted by marketrent
you joke, but NIST probably has a standard 'rice cereal' somewhere in their catalogue for testing
freds_got_slacks t1_j7etpmc wrote
Any reporting on what the ground accelerations were measured at?
freds_got_slacks t1_iu6g5ro wrote
Reply to comment by MocoMojo in Newly discovered species of bacteria in the microbiome may be a culprit behind rheumatoid arthritis by geoxol
Except where did I say there's only 2 types? I said the main types, which are the most common https://www.mayoclinic.org/diseases-conditions/arthritis/symptoms-causes/syc-20350772
freds_got_slacks t1_iu66xcs wrote
Reply to comment by GypsyDarkEyes in Newly discovered species of bacteria in the microbiome may be a culprit behind rheumatoid arthritis by geoxol
just keep in mind there's two main types of arthritis; osteoarthritis and rheumatoid arthitis. Osteo is basically just mechanical wear of the cartilage as where rheumatoid is an autoimmune disease that attacks the cartilage.
this article is specifically talking about rheumatoid arthritis
freds_got_slacks t1_ittmhex wrote
this just sounds like wheeled locomotion with extra steps
freds_got_slacks t1_j9bdpqg wrote
Reply to comment by manicdee33 in ‘We found the Artemis-I noise level at 5 km had a crackling quality about 40 million times greater than a bowl of Rice Krispies.’ — Maximum noise measured during Artemis-I launch on 16 Nov. 2022 was higher than predicted by marketrent
https://asa.scitation.org/na101/home/literatum/publisher/aip/journals/content/jel/2023/jel.2023.3.issue-2/10.0016878/20230211/images/large/10.0016878.figures.online.f4.jpeg
In this figure from that paper, while the flat peak is 120 dB centred around 20 Hz, with an A-weighting this only translates to about peak 95 dBA around 200 to 1000 Hz.
Measurements for occupational safety are done with A weighting, but would there be any safety concern with an unweighted 127 dB SPL at 20 Hz? or is A weighting still sufficient ?
Edit: higher res figure