iPhones and Android devices have a feature called Sound Recognition . You can set your phone to "listen" for specific loud sounds (like a loud bang or clap) and send you a visual notification—useful for the hearing impaired or when wearing headphones.

If you are looking to download or explore this as a "feature" for a project or device, here are the most common contexts: 🔊 Sound Libraries & Downloads

Many third-party apps use the microphone to trigger an alarm or flashlight when they detect a loud "double clap," helping you find a lost device.