Heartbeat recordings have long been a staple of film, television and game sound design because the pulse is instantly understood without any explanation. Short isolated versions like this one spread online through soundboards and editing packs, where creators label and share them by page or pack number for quick reuse. That plain labelling is why titles like page 16 appear, separating one steady take from faster, slower or more dramatic variants. It remains popular for horror, medical drama, romance and suspense edits where a simple rhythm can carry emotion.