diff --git a/Assets/Scripts/Framework/AudioKit/AudioManager.cs b/Assets/Scripts/Framework/AudioKit/AudioManager.cs
index e10957eb3..f05d61633 100644
--- a/Assets/Scripts/Framework/AudioKit/AudioManager.cs
+++ b/Assets/Scripts/Framework/AudioKit/AudioManager.cs
@@ -468,13 +468,19 @@ namespace AibisDream.Kit
 
         public void SetVolume(float normalizedVolume)
         {
-            // 将 0~1 映射到 minDecibels ~ maxDecibels，再转换为线性幅度
-            // 使用对数曲线匹配人耳听觉特性
-            float db = Mathf.Lerp(minDecibels, maxDecibels, normalizedVolume);
-            float linearVolume = Mathf.Pow(10f, db / 20f);
+            normalizedVolume = Mathf.Clamp01(normalizedVolume);
 
-            var masterVca = RuntimeManager.GetBus("bus:/");
-            masterVca.setVolume(linearVolume);
+            // 最低档需要真正静音；有限的最小分贝值仍会保留可听的线性幅度。
+            float linearVolume = 0f;
+            if (normalizedVolume > 0f)
+            {
+                // 将非零音量映射到 minDecibels ~ maxDecibels，保留原有的对数听感曲线。
+                float db = Mathf.Lerp(minDecibels, maxDecibels, normalizedVolume);
+                linearVolume = Mathf.Pow(10f, db / 20f);
+            }
+
+            var masterBus = RuntimeManager.GetBus("bus:/");
+            masterBus.setVolume(linearVolume);
         }
 
         #endregion