{"r": "/subjects/sound","nt":"Explore This Subject","p":[{ "u":"/index.htm","t":"Home " } , { "u":"/soundpreservation.htm","c":"has-sub","t":"Sound Preservation " ,"p":[ { "u":"/soundsmatter.htm","t":"Why Sounds Matter " } ] } , { "u":"/explore.htm","c":"has-sub","t":"Exploring Sound " ,"p":[ { "u":"/difference.htm","t":"Making a Difference " } , { "u":"/enhance.htm","t":"Enhance Your Soundscape " } ] } , { "u":"/understandingsound.htm","c":"has-sub","t":"Understanding Sound " ,"p":[ { "u":"/noise.htm","c":"has-sub","t":"Noise " ,"p":[ { "u":"/effects_wildlife.htm","t":"Effects of Noise on Wildlife " } , { "u":"/effects_wilderness.htm","t":"Effects of Noise on Wilderness " } , { "u":"/effects_visitors.htm","t":"Effects of Noise on Visitors " } , { "u":"/effects_cultural.htm","t":"Effects of Noise on Cultural-Historical Resources " } ] } , { "u":"/improvingsoundscapes.htm","c":"has-sub","t":"Improving Soundscapes " ,"p":[ { "u":"/rideright.htm","c":"isHidden","t":"Motorcyle Riding in Parks " } ] } ] } , { "u":"/measure.htm","c":"has-sub","t":"Measuring Sound " ,"p":[ { "u":"/field.htm","t":"In the Field " } , { "u":"/data.htm","t":"Types of Data " } , { "u":"/soundmap.htm","c":"has-sub","t":"Mapping Sound " ,"p":[ { "u":"/mapfaq.htm","t":"Mapping Sound FAQ " } ] } ] } , { "u":"/overflights.htm","c":"has-sub","t":"Overflights " ,"p":[ { "u":"/airtours.htm","t":"Air Tours " } , { "u":"/uas.htm","c":"has-sub","t":"Unmanned Aircraft Systems " ,"p":[ { "u":"/uas-training.htm","c":"isHidden","t":"Training on the Use of UAS " } ] } , { "u":"/military.htm","t":"Military Overflights " } ] } , { "u":"/references.htm","c":"has-sub","t":"References " ,"p":[ { "u":"/articles.htm","t":"Articles " } , { "u":"/teaching.htm","t":"Teaching Materials " } , { "u":"/acousticmonitoring_reports.htm","t":"Acoustic Monitoring Reports " } , { "u":"/events.htm","t":"Events " } , { "u":"/policy.htm","t":"Policies & Authorities " } , { "u":"/video.htm","t":"Video Gallery " } , { "u":"/gallery.htm","t":"Sound Gallery " } , { "u":"/resources.htm","t":"Additional Information " } ] } ]}