How 128 Hz Sounds to the Human Ear

This video explores the properties of sound at 128 Hz, presenting a pure tone to help understand frequency characteristics and auditory perception. Humans typically hear sounds from 20 Hz to 20,000 Hz (20 kHz), while dogs can detect frequencies up to 45 kHz. Frequencies above 20 kHz are inaudible to humans but play an important role in ultrasonic applications, such as dog whistles and medical imaging. Listening to individual frequencies like 128 Hz helps illustrate how sound waves combine to form complex tones in music, speech, and environmental sounds. This video is part of a series designed to educate, entertain, and inspire curiosity about sound.