diff --git a/src/SoundManager.ts b/src/SoundManager.ts
index dbd4f02d..d86e5553 100644
--- a/src/SoundManager.ts
+++ b/src/SoundManager.ts
@@ -12,50 +12,49 @@ import { ITerminal, ISoundManager } from './Types';
 export const DefaultBellSound = 'data:audio/wav;base64,UklGRigBAABXQVZFZm10IBAAAAABAAEARKwAAIhYAQACABAAZGF0YQQBAADpAFgCwAMlBZoG/wdmCcoKRAypDQ8PbRDBEQQTOxRtFYcWlBePGIUZXhoiG88bcBz7HHIdzh0WHlMeZx51HmkeUx4WHs8dah0AHXwc3hs9G4saxRnyGBIYGBcQFv8U4RPAEoYRQBACD70NWwwHC6gJOwjWBloF7gOBAhABkf8b/qv8R/ve+Xf4Ife79W/0JfPZ8Z/wde9N7ijtE+wU6xvqM+lb6H7nw+YX5mrlxuQz5Mzje+Ma49fioeKD4nXiYeJy4pHitOL04j/jn+MN5IPkFOWs5U3mDefM55/ogOl36m7rdOyE7abuyu8D8Unyj/Pg9D/2qfcb+Yn6/vuK/Qj/lAAlAg==';
 
 export class SoundManager implements ISoundManager {
+  private _terminal: ITerminal;
+  private _audioContext: AudioContext;
 
-    private _terminal: ITerminal;
-    private _audioContext: AudioContext;
+  constructor(_terminal: ITerminal) {
+    this._terminal = _terminal;
+  }
 
-    constructor(_terminal: ITerminal) {
-        this._terminal = _terminal;
+  public playBellSound(): void {
+    const audioContextCtor: typeof AudioContext = (<any>window).AudioContext || (<any>window).webkitAudioContext;
+    if (!this._audioContext && audioContextCtor) {
+      this._audioContext = new audioContextCtor();
     }
 
-    public playBellSound(): void {
-        const audioContextCtor: typeof AudioContext = (<any>window).AudioContext || (<any>window).webkitAudioContext;
-        if (!this._audioContext && audioContextCtor) {
-            this._audioContext = new audioContextCtor();
-        }
+    if (this._audioContext) {
+      let bellAudioSource = this._audioContext.createBufferSource();
+      let context = this._audioContext;
+      this._audioContext.decodeAudioData(this.base64ToArrayBuffer(this.removeMimeType(this._terminal.options.bellSound)), function (buffer) {
+        bellAudioSource.buffer = buffer;
+        bellAudioSource.connect(context.destination);
+        bellAudioSource.start(0);
+      });
+    } else {
+      console.warn('Sorry, but the Web Audio API is not supported by your browser. Please, consider upgrading to the latest version');
+    }
+  }
 
-        if (this._audioContext) {
-            let bellAudioSource = this._audioContext.createBufferSource();
-            let context = this._audioContext;
-            this._audioContext.decodeAudioData(this.base64ToArrayBuffer(this.removeMimeType(this._terminal.options.bellSound)), function (buffer) {
-                bellAudioSource.buffer = buffer;
-                bellAudioSource.connect(context.destination);
-                bellAudioSource.start(0);
-            });
-        } else {
-            console.warn('Sorry, but the Web Audio API is not supported by your browser. Please, consider upgrading to the latest version');
-        }
+  private base64ToArrayBuffer(base64: string): ArrayBuffer {
+    const binaryString = window.atob(base64);
+    const len = binaryString.length;
+    let bytes = new Uint8Array(len);
+
+    for (let i = 0; i < len; i++) {
+      bytes[i] = binaryString.charCodeAt(i);
     }
 
-    private base64ToArrayBuffer(base64: string): ArrayBuffer {
-        const binaryString = window.atob(base64);
-        const len = binaryString.length;
-        let bytes = new Uint8Array(len);
+    return bytes.buffer;
+  }
 
-        for (let i = 0; i < len; i++) {
-            bytes[i] = binaryString.charCodeAt(i);
-        }
+  private removeMimeType(dataURI: string): string {
+    // Split the input to get the mime-type and the data itself
+    const SplitURI = dataURI.split(',');
 
-        return bytes.buffer;
-    }
-
-    private removeMimeType(dataURI: string): string {
-        // Split the input to get the mime-type and the data itself
-        const SplitURI = dataURI.split(',');
-
-        // Return only the data
-        return SplitURI[1];
-    }
+    // Return only the data
+    return SplitURI[1];
+  }
 }