What is galtons whistle method?

Galton's whistle method, developed by Sir Francis Galton in the late 19th century, is a technique used to investigate the range of human hearing, particularly in relation to high-frequency sounds. It involves using a specially designed whistle that can produce sounds at frequencies beyond the upper limit of human hearing, which is typically around 20 kHz. By adjusting the frequency and observing individuals' responses, Galton aimed to understand the variations in auditory sensitivity among people. This method contributed to the study of human perceptions and the limits of sensory capabilities.