Hi, very interesting. actually low frequencies travel further, that's why elephants use infrasound to communicate long distances of many kilometers. And higher frequencies are blocked more by obstructions. That's why when you're outside a locked door with loud music inside you only hear the bass notes until you open the door, and you can block out cicada noises or the sweep sound of the tube of an old CRT television simply by covering your head with a thin bed sheet.
Thanks for this recording. Used it as an enhancement to audio I recorded in a wine tasting room, which I used to soundtrack the video below. Believe it or not, I caught no clicking glasses in the tasting room clip! Your clinks are about 4 seconds into the video. They help create the ambience :) Cheers! https://www.youtube.com/watch?v=CEJAMABej6w