Is this for loggin noise?

[MisterMakerNL]

Hey,
I also have this meter, first I was just going to use Windows. But the lack of any autmated logging is a bit worrying.
Can you use this to log the data? Can I send it to a webserver?

[davegudge]

I've used @ciembor 's work to successfully connect a gm1356 to a device running Ubuntu server.

Once connected you should be able to run bin/gm1356 and see a log output of the reading from the device.

I've used this repository to gain access to the output, then build upon that to store the output in a database, so I can then report on the data:

[MisterMakerNL]

owh that is nice! The local government decided to place a disco next to my house at 100mtr. I asked them to come and measure the sound, they told me it was to expensive. Now I am here.... I know it is not a valid measuring, but should be enough to make them come and measure themself.
Is it possible for me to get such a system you made working? I only did small amount of linux work on my pi's.

[ciembor]

@HaasNL2 I started work on system for measuring environmental noise. I calculate Equivalent Continuous Sound Level (LAeq) for each hour based on Polish indicators. I think they should be similar or the same in all EU countries.

It's here: https://github.com/ciembor/dobra-noc

I don't have currently time for development. I have to work on commercial project. But it looks that my friend will continue it. The goal is to have a platform with clients installed on Raspberry PI. Currently it's standalone app, so you can connect sonometer to the laptop, run Dobra Noc (Good Night :)) and the results will be stored to the database. In the same time it is possible to display them in a browser for each recorded hour.

Feel free to test it, report what you need and create some GH Issues. Or maybe even pull requests? If you want to learn some Ruby / Vue.js, we need some contribution. It's not rocket science and it looks there are many people in a similar situation to yours. I found a lot of them in my city already :(.

[davegudge]

Funny enough, I have this setup for a similar purpose. The local council have said that the graphs/charts on thier own could not be used as evidence, however, they have sent out diary sheets to complete, and they said the charts will complement the diary entries.

I've used a Ruby on Rails app to do the charts above. Would that be of any use to you? As I could look to move the code into a public repos, however, it would require some knowledge to get it up and running.

An alternative option (which I did first) would be to capture the output from bin/gm1356 into a file on the server. You could then take that data and use an online charting tool to generate a graph. There's lots out there, I used https://chart-studio.plot.ly/create/#/

EDIT:

@HaasNL2 I forgot to mention that the local coucil have not shown much interested in doing anything, however it may be worth searching for the 'Environmental Health' department within the council, as they have been very helpful in my area. They are the ones who have sent out diary sheets etc.

[ciembor]

@davegudge maybe we could merge our apps into one and make it useful for more people?

[MisterMakerNL]

Nice work all of you I need some time to process all that information.
I am pretty good with 3D printers and 3D modeling so I tried to help out too with my skills, and made a casing/mount for the GM1356 I just uploaded it here:
https://www.printables.com/model/6631-gm1356-holder (updated link)
It is now hanging on the front of my building.

About my issue with the council.
I asked them to come and place a fixed dB measuring, they said they only send a guy to come measure when there are complains. But the official complains get published online, which they can read and act on.
Also the last 3 measurements failed, because of background noises. (coming from the visitors of the disco) Which you van probably average off when you have enough data.

The guy who was responsible about the measuring, said to me it was to expensive to mount a fixed measuring device. And I then asked him how much it would cost. Instead of giving me a euro figure he told me "it didn't work that way". I now assume he didn't even bothered to check the costs. He told me that in a phone call which I was recording and now I have made an official complain against him. Fun times!

[ciembor]

@HaasNL2 That's awesome, I was thinking how to protect it from rain :).

[davegudge]

@ciembor It's certainly an option.

I calculate Equivalent Continuous Sound Level (LAeq) for each hour based on Polish indicators.

This sounds interesting. I've had to do some research into sound/decibels etc I kind of feel the graph should be a reverse logarithmic to give a more accurate representation of the increasing levels of sound. e.g. the y-axis would be scaled like this:

I couldn't find any charting tools to create that, so I did experiment with colours:

@HaasNL2 The case is really cool. Much better than the piece of plastic I am currently using!

[davegudge]

@ciembor I think https://github.com/ciembor/dobra-noc might be private as it presents a 404.

[ciembor]

@davegudge I use Chart.js and they also don't have it. They have only logaritmic scale. But the numbers don't lie and are more important as an evidence.

You are right, I made it public :).

[davegudge]

I've been using Chart.js too (via chartkick), the coloured chart was experimenting with highcharts.

You are right, I made it public :).

RoR and 5.2 too 👍 I'll have to find some time to take a look. The rails app I've created so far is over on bitbucket, it was hosted before github allowed private repos for free. I'll look to move it over onto github and make it public too. It's still on 5.1 at the moment 😢 Never enough time to spend working on these side projects.

[ciembor]

@davegudge Yes, not enough time for side projects and writing tests for them :D.

[davegudge]

and writing tests for them

🤣

[ciembor]

@davegudge did you succeed to display graph in inverted logarithmic (exponential) scale? I found this: https://github.com/holtalanm/chartjs-exponential-scale
But I have no idea if it works. It would be nice to write chartjs plugin for this.

[davegudge]

@ciembor I haven't managed to invert a logarithmic scale so far, and tbh, I haven't looked into it (again) since we discussed above.

When I did look into it, I had a play with Logarithmic axis in highcharts, however, this obviously didn't present the data in the way required for a db scale. There is a option to invert the y-axis, however, that still doesnt acheive the desired affect, I ended up with an upsidedown chart 😆

Nice find on the plugin above. I think that could be used as a based to create a scale that could be used for db scale. I don't think it's possible to use logarithmic in it's standard form, but I could be wrong!