Listen to soil sounds, produced by water and soil macrofauna, such as earthworms, centipedes, larvae, etc.. Comparing sound abundance can give a direct indication into soil health, namely the amount of living organisms within and the quality of soil structure.
Sounds are abundant, which is in line with the observed biodiversity and soft soil. The forest has had time to develop enough for the soil to have created a tunnel system and a suitable habitat for the organisms to live inside.
The sounds are not as abundant. The reason for this could be the lack of ground plants and partially polluted soil. In the location of recording there were lower plants growing in a patch where scarce brick waste was observed.
As this park has a high biodiversity its soil has developed and the abundance of sounds reflects the healthy soil structure as well as indicates the presence of larger soil organisms.
The main sound heard in this recording has so far been unrecognised and rarely appears in soil recordings. However the usual crackling sound is not abundant, which indicates that the soil structure has not yet recovered. This could becasue the methodology of using mulch and a variety of plants has only recently been developed and does not contain active input of organic matter.
The sounds are not that abundant which could be explained by the lack of plant diversity and the fact that the plants used here are non-native, therefore creating less connections with local soil fauna.
There are no continuous crackling sounds, but rather short sudden movements. This could be due to the raised beds of the garden, not linking underground and garden soil.
The trees and bushes are covered by bare and hard soil, which creates a low quality soil. The lack of soil sounds is saved by local church bells and passing cars.
The overall silent quality is due to soil sealing, completely covering the soil from any water or air infiltration.