: Most human farts have a peak frequency between 200 Hz and 300 Hz .
: While dominated by low rumbles, farts also generate broadband frequency spectra that extend into the ultrasonic range (above 16 kHz).
Fart sounds generally occupy the lower frequency spectrum but possess complex harmonic structures:
: Variations in volume can range from a whisper (20 dB) to loud, "thunderous" blasts that may exceed conversational noise levels (60–70+ dB) depending on gas buildup and force.
A fart sound effect (SFX) is an acoustic event produced by the vibration of the anal opening as pressurized gas is expelled from the rectum . The specific tone, pitch, and texture of the sound are determined by a combination of gas volume, exit velocity, and the tension of the sphincter muscle. Acoustic Characteristics
: They often feature odd harmonics (e.g., 750 Hz and 1250 Hz), similar to the acoustic properties of a brass instrument like a trombone.
