This is a testing site only. See the live Public Lab site here »


Noise
noise

Noise pollution can have a harmful impact on both wildlife and human health. There are several notable community science projects that have focused on noise monitoring, some that use phone applications and others that use noise meters. _Lead image from NoiseTube_ ## Noise monitoring resources and projects: ### Apps Noise can by monitored by apps downloaded to your phone. Here's a [Blog post on Apps for noise mapping](http://www.opensourcesoundscapes.org/2016/08/28/a-tentative-state-of-the-art-of-applications-for-crowdsourced-noise-sound-maps/) by Antonella Radicchi. Here are some App options: - [Softhook.com](http://www.softhook.com/heathrow/technology-involved/) by Christian Nold: a DIY noise monitoring that he’s deploying around Heathrow - [Citi-Sense](http://www.citi-sense.cn/download): app for evaluating soundscapes - by Chunming Li, from the Chinese Academy of Science - [NoiseTube](http://www.noisetube.net): one of the very first apps that was developed _Note from Muki Haklay: There are issues with the calibration of phones with apps, which was an issue in some of the work that we’ve done few years ago, so I would also think that you can use class I noise meters._ ### Noise Meters - [Class I noise meters](https://www.maplin.co.uk/p/digital-sound-level-meter-n05cc) (they’re not super expensive – about £50 ) - [Sound Around Town](http://soundaroundtown.org/) adapted commercial recording units (Roland-05) and developed calibration devices so that participants in the project can borrow the equipment from local libraries and deploy in their backyards according to a specific protocol. The data will improve the NPS national soundscape maps (which need refinement but are already useful for studies of noise as an EJ issue (e.g., [this new study](https://ehp.niehs.nih.gov/ehp898/?utm_source=rss&utm_medium=rss&utm_campaign=ehp898)). ## Questions [questions:noise] ## Notes [notes:noise!question:noise] ## Activities [activities:noise] ...


Author Comment Last activity Moderation
Chuck_Kardous "Hi! We tested hundreds of apps, published results in the Journal of Acoustical Society of America, if you'd like more information, check out our s..." | Read more » over 5 years ago
cfastie " I kinda like the switch on the Riffle and now I know that it is something to pay more attention to. But I guess it adds much more complexity that ..." | Read more » over 6 years ago
donblair "Chris, This is such a beautiful project! The lapse rate calculation is so fun to see. Quick reactions: That power switch goof is annoying. I w..." | Read more » over 6 years ago
ggallant "D5 appears to connect the INT/SQW on the RTC to PD5 on the CPU. I would be very interested in how one uses the feature. I'm assuming that it requir..." | Read more » over 6 years ago
mathew "The RTC can be set to shutdown and wake the AT328P, it just uses another pin that could be used for a sensor. @donblair left an exposed pin availa..." | Read more » over 6 years ago
ggallant "Chris, I really don't know the actual time but assuming 800usec (nice for the math) to sleep and wake up it would be 800 / 8,000,000 or 0.01% whi..." | Read more » over 6 years ago
cfastie "George that's a good point. Although the real time clock is running all the time, it is not smart enough to do something as complicated as setting ..." | Read more » over 6 years ago
ggallant "I think 8 seconds is the "maximum" interval with a 16MHz crystal. You wake up every 8 seconds and can go back to sleep if there is no work to be do..." | Read more » over 6 years ago
cfastie "Don thinks that eight seconds might be the minimum interval during which the system can be put into deep sleep. So all the sleep stuff happens in m..." | Read more » over 6 years ago
ddileona "Cool! One question: I thought I read in the riffle documentation that you could only log in multiples of 8 seconds. That seemed liked a weird mult..." | Read more » over 6 years ago
stoft "@Warren, thanks for the suggestions. Take a look (above) at the two new plots which replace the one(s) you referenced. You're right, the new ones m..." | Read more » over 6 years ago
warren "Great post! I love how you so clearly stated some of the conclusions. A few thoughts: maybe I missed this, but to @viechdokter's comment, are th..." | Read more » over 6 years ago
viechdokter "@warren: I just had a look at an old spectrum CSV file of yours (3 years ago): https://spectralworkbench.org/spectrums/481 There it was unscaled ..." | Read more » over 6 years ago
warren "I went ahead and created a specific issue for native 8-bit storage: https://github.com/publiclab/spectral-workbench.js/issues/18 As well as outlin..." | Read more » over 6 years ago
viechdokter "Talking about hung-up scripts, it often is a pain in the neck to login to SBW. "Do you trust this site with your identity?" "Yes" "You must login t..." | Read more » over 6 years ago
stoft "It's ok to have a 'scaled' data file -- but ONLY if that file is clearly identified as such ... like /SpectrumData-SCALED_20160420.csv or /Spectru..." | Read more » over 6 years ago
warren "Hi, all -- 2.55 is definitely related to the 0-255 value. The code that generates the CSV is here: https://github.com/publiclab/spectral-workbench..." | Read more » over 6 years ago
viechdokter "I could re-scale but ... when everybody here gets the same minimum 2.55 increments here and you want reproducible spectral data then everyone shoul..." | Read more » over 6 years ago
stoft "Hmmm, well the RAW data should have the same scale units which would be unsigned 8-bit integer from 000 to 255 -- so the Y axis should show noise h..." | Read more » over 6 years ago
viechdokter "I took the data from the CSV files that Spectral Workbench provides with my spectra. I had a look at one of dhaffners spectrum CSV files and see th..." | Read more » over 6 years ago
stoft "Well, except there's still a problem with the plot. The smallest increment looks to be '4 steps' per scale units of '10'. Either there was some mul..." | Read more » over 6 years ago
viechdokter "Okay, here I combined the 4 channel max/min-difference curves in one diagram so they have the same vertical scale now: And here the combined dat..." | Read more » over 6 years ago
stoft "Or, they are all 'bad' (noisy) to some degree ;-) The sharpness of the peak is still mostly a factor of slit, mechanical rigidity, being light-tigh..." | Read more » over 6 years ago
viechdokter "Looks like at least there are no "bad" pixels as they all show about the same amount of noise. The time averaging seems to achieve a very sharp-pe..." | Read more » over 6 years ago