diff --git a/viewsh-module-ops/viewsh-module-environment-biz/src/main/java/com/viewsh/module/ops/environment/integration/consumer/CleanOrderAuditEventHandler.java b/viewsh-module-ops/viewsh-module-environment-biz/src/main/java/com/viewsh/module/ops/environment/integration/consumer/CleanOrderAuditEventHandler.java
index 9ba39370..5010e32e 100644
--- a/viewsh-module-ops/viewsh-module-environment-biz/src/main/java/com/viewsh/module/ops/environment/integration/consumer/CleanOrderAuditEventHandler.java
+++ b/viewsh-module-ops/viewsh-module-environment-biz/src/main/java/com/viewsh/module/ops/environment/integration/consumer/CleanOrderAuditEventHandler.java
@@ -200,7 +200,7 @@ public class CleanOrderAuditEventHandler implements RocketMQListener<String> {
      */
     private void sendTts(Long deviceId, String text) {
         try {
-            voiceBroadcastService.broadcast(deviceId, text, 80);
+            voiceBroadcastService.broadcast(deviceId, text);
             log.info("[CleanOrderAuditEventHandler] TTS 下发成功: deviceId={}, text={}", deviceId, text);
         } catch (Exception e) {
             log.error("[CleanOrderAuditEventHandler] TTS 下发异常: deviceId={}", deviceId, e);
diff --git a/viewsh-module-ops/viewsh-module-environment-biz/src/main/java/com/viewsh/module/ops/environment/integration/consumer/CleanOrderConfirmEventHandler.java b/viewsh-module-ops/viewsh-module-environment-biz/src/main/java/com/viewsh/module/ops/environment/integration/consumer/CleanOrderConfirmEventHandler.java
index 108747de..c064e8d4 100644
--- a/viewsh-module-ops/viewsh-module-environment-biz/src/main/java/com/viewsh/module/ops/environment/integration/consumer/CleanOrderConfirmEventHandler.java
+++ b/viewsh-module-ops/viewsh-module-environment-biz/src/main/java/com/viewsh/module/ops/environment/integration/consumer/CleanOrderConfirmEventHandler.java
@@ -138,7 +138,7 @@ public class CleanOrderConfirmEventHandler implements RocketMQListener<String> {
             return;
         }
         try {
-            voiceBroadcastService.broadcast(deviceId, text, 80);
+            voiceBroadcastService.broadcast(deviceId, text);
             log.info("[CleanOrderConfirmEventHandler] TTS 下发成功: deviceId={}, text={}", deviceId, text);
         } catch (Exception e) {
             log.error("[CleanOrderConfirmEventHandler] TTS 发送失败: deviceId={}", deviceId, e);
diff --git a/viewsh-module-ops/viewsh-module-environment-biz/src/main/java/com/viewsh/module/ops/environment/service/voice/VoiceBroadcastService.java b/viewsh-module-ops/viewsh-module-environment-biz/src/main/java/com/viewsh/module/ops/environment/service/voice/VoiceBroadcastService.java
index f3c802f9..03e89f4d 100644
--- a/viewsh-module-ops/viewsh-module-environment-biz/src/main/java/com/viewsh/module/ops/environment/service/voice/VoiceBroadcastService.java
+++ b/viewsh-module-ops/viewsh-module-environment-biz/src/main/java/com/viewsh/module/ops/environment/service/voice/VoiceBroadcastService.java
@@ -16,13 +16,17 @@ import org.springframework.stereotype.Service;
  * 职责：
  * 1. 统一所有 TTS 下发入口
  * 2. 提供同步/异步播报接口
- * 3. 管理播报音量参数
- * 4. 记录播报日志
+ * 3. 记录播报日志
  * <p>
  * 设计原则：
  * - 接受 deviceId 参数（而非 cleanerId）
  * - 简单可靠，不实现复杂的去重逻辑，由调用方控制
  * - 直接调用 IoT 设备控制接口
+ * <p>
+ * JT808 TTS 播报标志 (tts_flag) 说明：
+ * - 0x01: 静默执行 - 设备收到后解析指令，修改参数，回复 0x0001，但不发声
+ * - 0x08: TTS 语音播报（普通通知） - 播放语音，设备将文本通过喇叭朗读
+ * - 0x09: TTS 语音播报（紧急通知） - 播放语音，通常带显示
  *
  * @author lzh
  */
@@ -30,6 +34,32 @@ import org.springframework.stereotype.Service;
 @Service
 public class VoiceBroadcastService {
 
+    /**
+     * TTS 服务标识符
+     */
+    private static final String TTS_IDENTIFIER = "TTS";
+
+    /**
+     * TTS 播报标志：静默执行
+     * <p>
+     * 设备收到后解析指令，修改参数，回复 0x0001，但不发声
+     */
+    public static final int TTS_FLAG_SILENT = 0x01;
+
+    /**
+     * TTS 播报标志：普通通知
+     * <p>
+     * 播放语音，设备将文本内容通过喇叭朗读出来
+     */
+    public static final int TTS_FLAG_NORMAL = 0x08;
+
+    /**
+     * TTS 播报标志：紧急通知
+     * <p>
+     * 播放语音（通常带显示），用于重要通知
+     */
+    public static final int TTS_FLAG_URGENT = 0x09;
+
     @Resource
     private IotDeviceControlApi iotDeviceControlApi;
 
@@ -37,23 +67,25 @@ public class VoiceBroadcastService {
     private EventLogRecorder eventLogRecorder;
 
     /**
-     * 播报语音（同步）
+     * 播报语音（紧急通知，默认）
+     * <p>
+     * 使用 tts_flag=0x09，适用于工单确认、到岗提醒等重要通知
      *
      * @param deviceId 设备ID
      * @param text     播报文本
      */
     public void broadcast(Long deviceId, String text) {
-        broadcast(deviceId, text, null);
+        broadcast(deviceId, text, TTS_FLAG_URGENT);
     }
 
     /**
-     * 播报语音（带音量）
+     * 播报语音（指定播报类型）
      *
      * @param deviceId 设备ID
      * @param text     播报文本
-     * @param volume   音量（0-100）
+     * @param ttsFlag  播报标志（0x01=静默, 0x08=普通, 0x09=紧急）
      */
-    public void broadcast(Long deviceId, String text, Integer volume) {
+    public void broadcast(Long deviceId, String text, int ttsFlag) {
         if (deviceId == null || text == null) {
             return;
         }
@@ -61,15 +93,15 @@ public class VoiceBroadcastService {
         try {
             IotDeviceServiceInvokeReqDTO reqDTO = new IotDeviceServiceInvokeReqDTO();
             reqDTO.setDeviceId(deviceId);
-            reqDTO.setIdentifier("tts");
+            reqDTO.setIdentifier(TTS_IDENTIFIER);
             reqDTO.setParams(MapUtil.<String, Object>builder()
-                    .put("text", text)
-                    .put("playMode", 1)  // 立即播报
-                    .put("volume", volume != null ? volume : 50)
+                    .put("tts_text", text)
+                    .put("tts_flag", ttsFlag)
                     .build());
 
             iotDeviceControlApi.invokeService(reqDTO);
-            log.debug("[VoiceBroadcast] 播报成功: deviceId={}, text={}", deviceId, text);
+            log.debug("[VoiceBroadcast] 播报成功: deviceId={}, text={}, flag=0x{}",
+                    deviceId, text, Integer.toHexString(ttsFlag));
 
             // 记录日志
             eventLogRecorder.info("clean", EventDomain.DEVICE, "TTS_SENT",
@@ -84,6 +116,30 @@ public class VoiceBroadcastService {
         }
     }
 
+    /**
+     * 播报语音（普通通知）
+     * <p>
+     * 使用 tts_flag=0x08，适用于一般性通知
+     *
+     * @param deviceId 设备ID
+     * @param text     播报文本
+     */
+    public void broadcastNormal(Long deviceId, String text) {
+        broadcast(deviceId, text, TTS_FLAG_NORMAL);
+    }
+
+    /**
+     * 播报语音（紧急通知）
+     * <p>
+     * 使用 tts_flag=0x09，适用于工单确认、到岗提醒等重要通知
+     *
+     * @param deviceId 设备ID
+     * @param text     播报文本
+     */
+    public void broadcastUrgent(Long deviceId, String text) {
+        broadcast(deviceId, text, TTS_FLAG_URGENT);
+    }
+
     /**
      * 播报语音（异步）
      *
@@ -94,16 +150,4 @@ public class VoiceBroadcastService {
     public void broadcastAsync(Long deviceId, String text) {
         broadcast(deviceId, text);
     }
-
-    /**
-     * 播报语音（异步，带音量）
-     *
-     * @param deviceId 设备ID
-     * @param text     播报文本
-     * @param volume   音量（0-100）
-     */
-    @Async("ops-task-executor")
-    public void broadcastAsync(Long deviceId, String text, Integer volume) {
-        broadcast(deviceId, text, volume);
-    }
 }