diff --git a/AVSCartonShipmentVerifier.csproj b/AVSCartonShipmentVerifier.csproj
index 0e54e59..9b56a64 100644
--- a/AVSCartonShipmentVerifier.csproj
+++ b/AVSCartonShipmentVerifier.csproj
@@ -13,4 +13,8 @@
     <PackageReference Include="Pomelo.EntityFrameworkCore.MySql" Version="9.0.0" />
   </ItemGroup>
 
+  <ItemGroup>
+    <None Update="Resources\Sound\alert.wav" CopyToOutputDirectory="PreserveNewest" CopyToPublishDirectory="PreserveNewest" />
+  </ItemGroup>
+
 </Project>
diff --git a/Program.cs b/Program.cs
index 2e6167b..1028f84 100644
--- a/Program.cs
+++ b/Program.cs
@@ -4,6 +4,7 @@ using AVSCartonShipmentVerifier.Repositories;
 using AVSCartonShipmentVerifier.ScanHistory;
 using AVSCartonShipmentVerifier.Services;
 using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.FileProviders;
 
 var builder = WebApplication.CreateBuilder(args);
 
@@ -50,6 +51,11 @@ if (!app.Environment.IsDevelopment())
 app.UseHttpsRedirection();
 app.UseRouting();
 app.UseAuthorization();
+app.UseStaticFiles(new StaticFileOptions
+{
+    FileProvider = new PhysicalFileProvider(Path.Combine(builder.Environment.ContentRootPath, "Resources")),
+    RequestPath = "/resources"
+});
 app.MapStaticAssets();
 
 app.MapControllerRoute(
@@ -58,4 +64,3 @@ app.MapControllerRoute(
     .WithStaticAssets();
 
 app.Run();
-
diff --git a/Resources/Sound/alert.wav b/Resources/Sound/alert.wav
new file mode 100644
index 0000000..8605fd7
Binary files /dev/null and b/Resources/Sound/alert.wav differ
diff --git a/wwwroot/js/verification-dashboard.js b/wwwroot/js/verification-dashboard.js
index e742bae..0a18028 100644
--- a/wwwroot/js/verification-dashboard.js
+++ b/wwwroot/js/verification-dashboard.js
@@ -17,6 +17,8 @@
     };
 
     const antiForgeryToken = document.querySelector('input[name="__RequestVerificationToken"]')?.value;
+    const failureAlarm = new Audio("/resources/Sound/alert.wav");
+    failureAlarm.preload = "auto";
     let isSubmitting = false;
 
     qrInput.addEventListener("keydown", async event => {
@@ -70,7 +72,6 @@
             if (!response.ok) {
                 const fallbackMessage = "Verification service is unavailable.";
                 setFailedState(payload.message ?? fallbackMessage);
-                triggerFailureAlarm();
                 resetDetails();
                 return;
             }
@@ -97,7 +98,19 @@
         }
 
         setFailedState(result.message);
-        triggerFailureAlarm();
+        if (shouldTriggerFailureAlarm(result)) {
+            triggerFailureAlarm();
+        }
+    }
+
+    function shouldTriggerFailureAlarm(result) {
+        const message = (result.message ?? "").toLowerCase();
+        return !result.existsInSystem
+            && (
+                message.includes("invalid qr format")
+                || message.includes("qr value is required")
+                || message.includes("not found")
+            );
     }
 
     function setFailedState(message) {
@@ -183,22 +196,10 @@
     }
 
     function triggerFailureAlarm() {
-        const context = new AudioContext();
-        const oscillator = context.createOscillator();
-        const gainNode = context.createGain();
-
-        oscillator.type = "sawtooth";
-        oscillator.frequency.setValueAtTime(740, context.currentTime);
-        oscillator.frequency.exponentialRampToValueAtTime(320, context.currentTime + 0.4);
-        oscillator.connect(gainNode);
-        gainNode.connect(context.destination);
-
-        gainNode.gain.setValueAtTime(0.0001, context.currentTime);
-        gainNode.gain.exponentialRampToValueAtTime(0.5, context.currentTime + 0.05);
-        gainNode.gain.exponentialRampToValueAtTime(0.0001, context.currentTime + 0.45);
-
-        oscillator.start(context.currentTime);
-        oscillator.stop(context.currentTime + 0.45);
-        oscillator.onended = () => context.close();
+        failureAlarm.pause();
+        failureAlarm.currentTime = 0;
+        failureAlarm.play().catch(() => {
+            // Some browsers block audio until the scanner input is treated as a user gesture.
+        });
     }
 })();