Hey all - new here and was wondering whether somebody could point me to a study or information that deals with the relationship between the degradation of sound quality (and volume) and external factors in an outdoors environment. I'm interested in what the impact of more plants, or a body of water would be on sound quality and volume for example. Don't care whether it's a pretty academic source. Topic came up in a dinner discussion and I'd love to educate myself a bit. Thanks! :-) Jack