Low frequency sounds are perceived at which part of the cochlea?

The perception of low-frequency sounds occurs at the apex of the cochlea. This anatomical arrangement is known as tonotopic organization, where different frequencies stimulate different areas of the cochlea. Low frequencies produce longer wavelengths, which travel further along the cochlear spiral and ultimately displace the basilar membrane near the apex, where it is wider and more flexible.

In contrast, high-frequency sounds are detected at the base of the cochlea, where the basilar membrane is narrower and stiffer, making it more suitable for responding to the shorter wavelengths of high-frequency sounds. The middle turn has a mix of frequency sensitivity and does not specialize in low frequencies, while the promontory is a feature of the inner ear structure rather than a specific region for sound frequency detection. Understanding these key differences in cochlear structure aids in the comprehension of how sound frequency discrimination occurs within the auditory system.