diff --git a/config/audio/audio_stream_collection.gd b/config/audio/audio_stream_collection.gd
index 59e9d3d4..f28aae4f 100644
--- a/config/audio/audio_stream_collection.gd
+++ b/config/audio/audio_stream_collection.gd
@@ -3,3 +3,4 @@ extends Resource
 class_name AudioStreamCollection
 
 @export var audios : Array[AudioStream] = []
+@export var db := 0
diff --git a/config/audio/random_audio_stream_player.gd b/config/audio/random_audio_stream_player.gd
index 708485fc..2d4effa3 100644
--- a/config/audio/random_audio_stream_player.gd
+++ b/config/audio/random_audio_stream_player.gd
@@ -15,6 +15,7 @@ func play_random():
 		return
 	var audio_collection := audio_collections.pick_random() as AudioStreamCollection
 	stream = audio_collection.audios.pick_random()
+	volume_db = audio_collection.db
 	if stream == null:
 		push_error("empty stream in audio_collection", audio_collection)
 		return
diff --git a/config/audio/sfx/footstep_室外.tres b/config/audio/sfx/footstep_室外.tres
index e2e5e314..fd99d0e7 100644
--- a/config/audio/sfx/footstep_室外.tres
+++ b/config/audio/sfx/footstep_室外.tres
@@ -8,3 +8,4 @@
 [resource]
 script = ExtResource("4_6irvv")
 audios = Array[AudioStream]([ExtResource("1_pfw3x"), ExtResource("2_gcvrs"), ExtResource("3_0un37")])
+db = -7.0
\ No newline at end of file
diff --git a/config/audio/sfx/footstep_硬地面.tres b/config/audio/sfx/footstep_硬地面.tres
index a6ba5190..a8191959 100644
--- a/config/audio/sfx/footstep_硬地面.tres
+++ b/config/audio/sfx/footstep_硬地面.tres
@@ -7,3 +7,4 @@
 [resource]
 script = ExtResource("3_ja105")
 audios = Array[AudioStream]([ExtResource("1_tww7m"), ExtResource("3_05da2")])
+db = -7.0