Controls

Frequency: 1000 Hz Amplitude: 60 dB SPL Sound type

Presets

Stats

Pitch—

Char. place—

Excited region—

Loudness—

Peak activation—

By place theory, the basilar membrane is a frequency analyser. Stiff & narrow at the base (high pitch), floppy & wide at the apex (low pitch). A travelling wave grows then peaks at the characteristic place given by the Greenwood function f = A(10^ax − k), then dies away. Hair cells there fire → that pitch is heard.