Why you dont hear the sound of airplane in night?

Oh, dude, you don't hear airplanes at night because they're all tucked into their little airplane beds, dreaming of being big, strong jets when they grow up. No, but seriously, it's because at night, the temperature and wind conditions change, causing sound waves to travel differently and making it harder for us to hear those noisy planes. So, next time you're wondering why it's so quiet at night, just remember those sleepy airplanes catching some Z's.