Research into human laughter identifies several distinct acoustic "features" used for analysis or AI classification: Fundamental Frequency (
: Newer technology like the Rich Laugh app uses AI algorithms to analyze a recorded 5-second laugh to determine its "vibe". Acoustic and Scientific Features : These include the
) : The pitch of the laugh, which varies significantly between voluntary and involuntary instances. the interval between those notes
: Applications like Laugh Party and Laugh out loud offer features to trigger various types of laughter (e.g., giggles, belly laughs) directly from a device or Apple Watch. Acoustic and Scientific Features Acoustic and Scientific Features : These include the
: These include the duration of "bursts" (vowel-like notes), the interval between those notes, and the overall intensity/volume decay of the laughter.
: A standard audio feature in comedy productions and video editors like Kapwing where pre-recorded laughter is added to a video to create a sense of community and highlight jokes.