diff --git a/html.qrc b/html.qrc
index dd07166..c99dd34 100644
--- a/html.qrc
+++ b/html.qrc
@@ -8,5 +8,6 @@
         <file>html/svg/message.svg</file>
         <file>html/realtimechat.js</file>
         <file>html/svg/airplane.svg</file>
+        <file>html/newmessage.mp3</file>
     </qresource>
 </RCC>
diff --git a/html/newmessage.mp3 b/html/newmessage.mp3
new file mode 100755
index 0000000..5fa431e
Binary files /dev/null and b/html/newmessage.mp3 differ
diff --git a/html/realtimechat.js b/html/realtimechat.js
index 2c09a40..7dc984f 100644
--- a/html/realtimechat.js
+++ b/html/realtimechat.js
@@ -4,14 +4,15 @@ let objCurrentServerStatus = document.getElementById("serverStatus");
 let objOnlineCounter = document.getElementById("online");
 let objOnlineList = document.getElementById("onlineList");
 
-const HTML_SERVER_ONLINE_MARKER = "✅";
-const HTML_SERVER_OFFLINE_MARKER = "❌";
-
-let ajaxUrl = document.getElementById("ajaxPath").innerText;
 let lastMessageId = document.getElementById("LMId").innerText;
 let reqIsFailed = false;
 let firstLoadingWithDisconnectedServer = false;
 
+const ajaxUrl = document.getElementById("ajaxPath").innerText;
+const audio = new Audio('/newmessage.mp3');
+const HTML_SERVER_ONLINE_MARKER = "✅";
+const HTML_SERVER_OFFLINE_MARKER = "❌";
+
 function appendMessage(nick /* if == "***", then system message */, message)
 {
     let messageObject = document.createElement("div");
@@ -26,7 +27,10 @@ function appendMessage(nick /* if == "***", then system message */, message)
         nicknameContainer.innerText = "IRCaBot";
     } else {
         nicknameContainer.innerText = nick;
-        nicknameContainer.setAttribute("style", "color: #1b4af5")
+        nicknameContainer.setAttribute("style", "color: #1b4af5");
+        if (document.hidden) {
+            audio.play();
+        }
     }
 
     let textContainer = document.createElement("div");
diff --git a/httpserver.cpp b/httpserver.cpp
index dd8ca1c..c66b2f1 100644
--- a/httpserver.cpp
+++ b/httpserver.cpp
@@ -197,6 +197,25 @@ void HttpServer::reader()
             }
         }
     }
+    else if (urlPath == "/newmessage.mp3") {
+        QString eTag = global::getValue(request, "If-None-Match", global::eHttpHeader);
+        if (eTag == HTTP_ACTUAL_ETAG) {
+            if (socket->isOpen()) socket->write(HEADER_304.toUtf8());
+        }
+        else {
+            QFile mp3("://html/newmessage.mp3");
+            if (mp3.open(QIODevice::ReadOnly)) {
+                QByteArray file = mp3.readAll();
+                mp3.close();
+                QString header = HEADER_MP3;
+                replaceTag(header, "SIZE", QString::number(file.size()));
+                if (socket->isOpen()) {
+                    socket->write(header.toUtf8());
+                    if (not isHeadRequest) socket->write(file);
+                }
+            }
+        }
+    }
     else if (urlPath == "/style.css") {
         QString eTag = global::getValue(request, "If-None-Match", global::eHttpHeader);
         if (eTag == HTTP_ACTUAL_ETAG) {
diff --git a/httpserver.h b/httpserver.h
index 2cc6508..c4e8d55 100644
--- a/httpserver.h
+++ b/httpserver.h
@@ -125,6 +125,12 @@ Content-Length: {{SIZE}}\r\n\r\n";
     const QString HEADER_JSON = "\
 HTTP/1.1 200 OK\r\n\
 Content-Type: application/json; charset=utf-8\r\n\
+Content-Length: {{SIZE}}\r\n\r\n";
+
+    const QString HEADER_MP3 = "\
+HTTP/1.1 200 OK\r\n\
+Content-Type: audio/mpeg;\r\n\
+ETag: \""+HTTP_ACTUAL_ETAG+"\"\r\n\
 Content-Length: {{SIZE}}\r\n\r\n";
 
     const QString HEADER_304 = "HTTP/1.1 304 Not Modified\r\nContent-Length: 0\r\n\r\n";