diff --git a/src/components/TimeCard.vue b/src/components/TimeCard.vue
index 48ecf6e..45a5dbf 100644
--- a/src/components/TimeCard.vue
+++ b/src/components/TimeCard.vue
@@ -811,6 +811,10 @@ export default {
       // 先加载配置，再启动会话检查（自动检测当前是否在晚自习时段并自动开始）
       this.loadNoiseSessionConfig().then(() => {
         this.startSessionCheck()
+        // autoStart: 不在自习时段时也自动开始监测（但不记录会话）
+        if (getSetting('noiseMonitor.autoStart') && !this.noiseMonitoring) {
+          this.startNoise()
+        }
       })
     }
   },
diff --git a/src/utils/settings.js b/src/utils/settings.js
index 9322da7..74e8a5e 100644
--- a/src/utils/settings.js
+++ b/src/utils/settings.js
@@ -103,13 +103,13 @@ const settingsDefinitions = {
   // 噪音监测设置
   "noiseMonitor.enabled": {
     type: "boolean",
-    default: false,
-    description: "启用环境噪音监测卡片",
+    default: true,
+    description: "启用环境噪音监测",
     icon: "mdi-microphone",
   },
   "noiseMonitor.autoStart": {
     type: "boolean",
-    default: false,
+    default: true,
     description: "打开页面时自动开始监测",
     icon: "mdi-play-circle-outline",
   },