Ian Photo Dr Ian Robinson
Physics Projects 'n Stuff
Home Research Blog Consult About

Budget Infrasound Monitor -- New for 2017-18

I have been working on a new geophysics project for the past few months a compact infrasound monitor based on a digital, i2c enabled diferential pressure sensor. As a taster I feel this is a beauty. Very open-ended with lots of opportunities for students of all levels - primary to postgrad - to redesign and test replacement components. This is also real science, in a little studied area. Well suited to networking in small or large areas. Oh - and cheap! see Blog (above) for current status

As an example of real data see Blog post for 27/7/2017 - Mean Acoustic Power - Sabic Gas Flare

Presently I am testing kit before seeking university involvement. I displayed at the Makerfaire in Newcastle 2018 but would rather not release full construction details and code just yet as I am still in testing stage. Please feel free to email me though if you would like construction details.

Rig A: Outdoors with windshield Rig B: Indoors for testing
Current InfraSound Plot
ΔP 0.01-10Hz - updates hourly (54.53°N 1.08°W +100m)
Current InfraSound Plot
ΔP 0.01-10Hz - updates hourly (54.53°N 1.08°W +100m)
Current InfraSound Plot
Acoustic Power 0.01-10Hz - updates hourly (54.53°N 1.08°W +100m)
Current InfraSound Plot
Acoustic Power 0.01-10Hz - updates hourly (54.53°N 1.08°W +100m)
Rig A: Archived plots Rig B: Archived plots

Either system will go down periodically. I am performing field tests near potential sources of infrasound such as local windfarms, quarry blasts, beaches (surf) and firing ranges.

The above are simple daily data plots. These are generated on the fly by the Pi used to monitor the sensor, and should be used for quick observation of output. The idea being that the data be downloaded from the PI for more detailed analysis. I have written a general analysis tool in python for this - examples below and on the Blog page (above).

infrasound
Prototype 1

Current InfraSound Plot
Infrasound Monitor raw data Aug -11th 2017

Current InfraSound Plot
Infrasound Monitor 'demeaned' -dayplot Aug -11th 2017

Current InfraSound Plot
Infrasound Monitor acoustic power dayplot Aug -11th 2017

Current InfraSound Plot
Infrasound Monitor spectrum Aug -11th 2017