I’m evaluating a Geophone with a RPi 3B+ and an ADS1115 16-Bit ADC
(I noticed that this will be a 16-Bit only. )
And I’m still testing.
Maybe you have some useful hints for me.
I’m having an Infrasound Incident with a defective heatpump of one of our neighbours.
This defective device is outside in the backyard-area.
It brings the walls and the windows to vibration.
If I put my ear on the wall I can here the noise
So the municipal employee was already here and has done an audio (by air) measurement.
The infrasound signal / noticeable noise is so weak, that the decibelmeter doesn’t heard anything.
And I think it was the wrong device for the measurement.
So I built up a Raspi and connected a Geophone using a ADS1115.
I’m recording 24/7 and push all the data in a Influx Database.
For visualising I use Grafana.
Now I’m getting some Spectrograms where the amplitude is shown.
But I want to have the frequencies too.
I want to have these plots:
Maybe you would like to help me a little to walk into the right direction.
What have I to calc to plot such a Picture ?
Maybe I could join this QCN with my DIY Geophone ?
I’m using a SM-24