The human ear is sometimes called a Fourier analyzer. What does this mean, and why is it an appropriate description?
Solution 41E Step 1 of 3 Spectrum analysis, also referred to as frequency domain analysis or spectral density estimation, is the technical process of decomposing a complex signal into simpler parts. In Fourier analysis the complex periodic patterns can be represented by the sum of sine waves having different amplitudes and frequencies. That is Fourier analysis enables one to break down complex periodic waveforms into their basic components, which happen to be sine waves of various frequencies, amplitudes, and phases. Step 2 of 3: Typical everyday sounds are said to be complex waves because they contain a range of frequency components. Inside ear, as the center frequency of the filters varies progressively with the position along the membrane , from low at the apex to high at the base. Thus, each frequency component in a complex sound will produce vibration at a different place in the membrane inside ear. The filtering observed will be sufficient to account for the frequency analysing the capacity of auditory system and we will be able to hear one sound in the presence of another sound with a different frequency largely as a consequence of the ear’s frequency analysis.