diff --git a/app/Http/Requests/NotificationSetting/UpdateGroupedSettingRequest.php b/app/Http/Requests/NotificationSetting/UpdateGroupedSettingRequest.php
index f550f23c..adcfeb80 100644
--- a/app/Http/Requests/NotificationSetting/UpdateGroupedSettingRequest.php
+++ b/app/Http/Requests/NotificationSetting/UpdateGroupedSettingRequest.php
@@ -25,75 +25,93 @@ public function rules(): array
             'notice.notice' => ['sometimes', 'array'],
             'notice.notice.enabled' => ['sometimes', 'boolean'],
             'notice.notice.email' => ['sometimes', 'boolean'],
+            'notice.notice.soundType' => ['sometimes', 'string', 'in:default,sam_voice,mute'],
             'notice.event' => ['sometimes', 'array'],
             'notice.event.enabled' => ['sometimes', 'boolean'],
             'notice.event.email' => ['sometimes', 'boolean'],
+            'notice.event.soundType' => ['sometimes', 'string', 'in:default,sam_voice,mute'],
 
             'schedule' => ['sometimes', 'array'],
             'schedule.enabled' => ['sometimes', 'boolean'],
             'schedule.vatReport' => ['sometimes', 'array'],
             'schedule.vatReport.enabled' => ['sometimes', 'boolean'],
             'schedule.vatReport.email' => ['sometimes', 'boolean'],
+            'schedule.vatReport.soundType' => ['sometimes', 'string', 'in:default,sam_voice,mute'],
             'schedule.incomeTaxReport' => ['sometimes', 'array'],
             'schedule.incomeTaxReport.enabled' => ['sometimes', 'boolean'],
             'schedule.incomeTaxReport.email' => ['sometimes', 'boolean'],
+            'schedule.incomeTaxReport.soundType' => ['sometimes', 'string', 'in:default,sam_voice,mute'],
 
             'vendor' => ['sometimes', 'array'],
             'vendor.enabled' => ['sometimes', 'boolean'],
             'vendor.newVendor' => ['sometimes', 'array'],
             'vendor.newVendor.enabled' => ['sometimes', 'boolean'],
             'vendor.newVendor.email' => ['sometimes', 'boolean'],
+            'vendor.newVendor.soundType' => ['sometimes', 'string', 'in:default,sam_voice,mute'],
             'vendor.creditRating' => ['sometimes', 'array'],
             'vendor.creditRating.enabled' => ['sometimes', 'boolean'],
             'vendor.creditRating.email' => ['sometimes', 'boolean'],
+            'vendor.creditRating.soundType' => ['sometimes', 'string', 'in:default,sam_voice,mute'],
 
             'attendance' => ['sometimes', 'array'],
             'attendance.enabled' => ['sometimes', 'boolean'],
             'attendance.annualLeave' => ['sometimes', 'array'],
             'attendance.annualLeave.enabled' => ['sometimes', 'boolean'],
             'attendance.annualLeave.email' => ['sometimes', 'boolean'],
+            'attendance.annualLeave.soundType' => ['sometimes', 'string', 'in:default,sam_voice,mute'],
             'attendance.clockIn' => ['sometimes', 'array'],
             'attendance.clockIn.enabled' => ['sometimes', 'boolean'],
             'attendance.clockIn.email' => ['sometimes', 'boolean'],
+            'attendance.clockIn.soundType' => ['sometimes', 'string', 'in:default,sam_voice,mute'],
             'attendance.late' => ['sometimes', 'array'],
             'attendance.late.enabled' => ['sometimes', 'boolean'],
             'attendance.late.email' => ['sometimes', 'boolean'],
+            'attendance.late.soundType' => ['sometimes', 'string', 'in:default,sam_voice,mute'],
             'attendance.absent' => ['sometimes', 'array'],
             'attendance.absent.enabled' => ['sometimes', 'boolean'],
             'attendance.absent.email' => ['sometimes', 'boolean'],
+            'attendance.absent.soundType' => ['sometimes', 'string', 'in:default,sam_voice,mute'],
 
             'order' => ['sometimes', 'array'],
             'order.enabled' => ['sometimes', 'boolean'],
             'order.salesOrder' => ['sometimes', 'array'],
             'order.salesOrder.enabled' => ['sometimes', 'boolean'],
             'order.salesOrder.email' => ['sometimes', 'boolean'],
+            'order.salesOrder.soundType' => ['sometimes', 'string', 'in:default,sam_voice,mute'],
             'order.purchaseOrder' => ['sometimes', 'array'],
             'order.purchaseOrder.enabled' => ['sometimes', 'boolean'],
             'order.purchaseOrder.email' => ['sometimes', 'boolean'],
+            'order.purchaseOrder.soundType' => ['sometimes', 'string', 'in:default,sam_voice,mute'],
 
             'approval' => ['sometimes', 'array'],
             'approval.enabled' => ['sometimes', 'boolean'],
             'approval.approvalRequest' => ['sometimes', 'array'],
             'approval.approvalRequest.enabled' => ['sometimes', 'boolean'],
             'approval.approvalRequest.email' => ['sometimes', 'boolean'],
+            'approval.approvalRequest.soundType' => ['sometimes', 'string', 'in:default,sam_voice,mute'],
             'approval.draftApproved' => ['sometimes', 'array'],
             'approval.draftApproved.enabled' => ['sometimes', 'boolean'],
             'approval.draftApproved.email' => ['sometimes', 'boolean'],
+            'approval.draftApproved.soundType' => ['sometimes', 'string', 'in:default,sam_voice,mute'],
             'approval.draftRejected' => ['sometimes', 'array'],
             'approval.draftRejected.enabled' => ['sometimes', 'boolean'],
             'approval.draftRejected.email' => ['sometimes', 'boolean'],
+            'approval.draftRejected.soundType' => ['sometimes', 'string', 'in:default,sam_voice,mute'],
             'approval.draftCompleted' => ['sometimes', 'array'],
             'approval.draftCompleted.enabled' => ['sometimes', 'boolean'],
             'approval.draftCompleted.email' => ['sometimes', 'boolean'],
+            'approval.draftCompleted.soundType' => ['sometimes', 'string', 'in:default,sam_voice,mute'],
 
             'production' => ['sometimes', 'array'],
             'production.enabled' => ['sometimes', 'boolean'],
             'production.safetyStock' => ['sometimes', 'array'],
             'production.safetyStock.enabled' => ['sometimes', 'boolean'],
             'production.safetyStock.email' => ['sometimes', 'boolean'],
+            'production.safetyStock.soundType' => ['sometimes', 'string', 'in:default,sam_voice,mute'],
             'production.productionComplete' => ['sometimes', 'array'],
             'production.productionComplete.enabled' => ['sometimes', 'boolean'],
             'production.productionComplete.email' => ['sometimes', 'boolean'],
+            'production.productionComplete.soundType' => ['sometimes', 'string', 'in:default,sam_voice,mute'],
         ];
     }
 }
diff --git a/app/Services/NotificationSettingService.php b/app/Services/NotificationSettingService.php
index 21061fda..4ba1e401 100644
--- a/app/Services/NotificationSettingService.php
+++ b/app/Services/NotificationSettingService.php
@@ -265,15 +265,18 @@ public function getGroupedSettings(): array
 
                 if ($settings->has($type)) {
                     $setting = $settings->get($type);
+                    $soundType = $setting->settings['sound_type'] ?? 'default';
                     $groupData[$camelKey] = [
                         'enabled' => $setting->push_enabled,
                         'email' => $setting->email_enabled,
+                        'soundType' => $soundType,
                     ];
                 } else {
                     // 기본값
                     $groupData[$camelKey] = [
                         'enabled' => false,
                         'email' => false,
+                        'soundType' => 'default',
                     ];
                 }
             }
@@ -330,6 +333,17 @@ public function updateGroupedSettings(array $data): array
 
                     if (isset($groupData[$camelKey])) {
                         $itemData = $groupData[$camelKey];
+
+                        // 기존 settings JSON을 유지하면서 sound_type만 업데이트
+                        $existing = NotificationSetting::where('tenant_id', $tenantId)
+                            ->where('user_id', $userId)
+                            ->where('notification_type', $type)
+                            ->first();
+                        $existingSettings = $existing?->settings ?? [];
+                        if (isset($itemData['soundType'])) {
+                            $existingSettings['sound_type'] = $itemData['soundType'];
+                        }
+
                         NotificationSetting::updateOrCreate(
                             [
                                 'tenant_id' => $tenantId,
@@ -342,6 +356,7 @@ public function updateGroupedSettings(array $data): array
                                 'sms_enabled' => false,
                                 'in_app_enabled' => $itemData['enabled'] ?? false,
                                 'kakao_enabled' => false,
+                                'settings' => $existingSettings ?: null,
                             ]
                         );
                     }