At 7.1 seconds, the clip is long enough to build tension but still easy to place between spoken lines. Download the MP3 once to keep it available offline, and trim only trailing silence if your editor adds any. On phones that support custom audio, assign the file as a ringtone or notification tone. Keep dialogue slightly louder when layering it under speech, because the cue can mask quiet words. For a stronger payoff, follow it with a Metal Gear alert or an evil laugh.