As part of my research,I’m hoping to capture relatively simple acoustic metrics, such as pump volume levels, persistence, and reflection, but I was advised that hydromoths can't be calibrated to be compared against one another, and for my study, I am wanting to deploy 5/6 along a transect and need them to be comparable to one another to measure the distance of noise the pump generates.
Does anyone have any experience with this at all or have a work-around that I could use as hydromoths are such a good, cost-effective option for my study as a first year PhD!
Hi, If it is easy to do the deployment, it would be worth trying two transects with the HydroMoths in different locations to see how closely they agree. The calibration challenge is due to resonances from the air-filled cavity making the response quite directional. However, this hasn't really been characterised and may not be significant in the frequency range that you are working in. Alex