There might be a perception thing involved as well. Insects tend to emit sound in high frequencies and adults get worse in hearing those as they age. When I was

There might be a perception thing involved as well. Insects tend to emit sound in high frequencies and adults get worse in hearing those as they age. When I was in my early 20s, my mother once swore there were no crickets around while I was like "how can you not hear them? They're so loud...". Nowadays, I wonder were the crickets have gone...