Years ago there used to be a farm across from my house. The sounds that came from there were only from the animals that lived there. The pigs, sheep, cows and constant chirping from the passing birds during the day and at night the constant droning from the crickets. Now only 10 years later it is all gone. No more birds or insects- just the noise of cars and busses driving all day and into the night.
I agree that the sounds of the world have changed and in some places very rapidly. We talk about climate change and that the world we see is what is changing. We can see the glaciers melt, the sea levels rise, coral reefs die, but we don’t often talk about what we hear. Seeing is believing but a sound can do just as much as an image if not more.
People react differently to the same sound. Some may cry or laugh at the same noise. It really depends on our perspective. Two people could hear the sound of a glacier falling into the ocean but one would imagine a larger piece of ice fall than the other. The fact that sound can come from a source but have multiple interpretations is what makes it valuable and important to conserve.
The world is changing but we need to realize that more than just what we can see is changing. The sounds we hear everyday are changing as well. We might not realize it but if we open our ears and listen we might just hear the difference.