Update src/spatial.rs

Co-authored-by: Nathan Graule <solarliner@gmail.com>

src/spatial.rs

@@ -66,7 +66,7 @@ pub struct SpatialEmitter {
 impl Default for SpatialEmitter {
     fn default() -> Self {
         Self {
-            attenuation: Some(Easing::Linear),
+            attenuation: Some(Easing::OutPowi(2)),
             enable_spatialization: true,
             distances: EmitterDistances::default(),
         }