Neil degrades Tyson talked about this on the Joe Rogan show. Jet engines became more efficient and were mandated to be quieter. I'm not sure about altitude beca

Neil degrades Tyson talked about this on the Joe Rogan show. Jet engines became more efficient and were mandated to be quieter. I'm not sure about altitude because I live near a major airport. Always have lived near airports. The general noise is flat out less.