The Peripheral Auditory System

Figure 3 displays the major parts of the auditory system: outer ear, middle ear, inner ear, and the central nervous system. The outer ear collects the sound for delivery to the middle ear, which allows air pressure to effectively vibrate the fluids and tissues of the inner ear. The inner ear serves as the auditory biological transducer translating vibration into a neural code for intensity, frequency, and temporal structure. The central nervous system processes this neural code, allowing for sound source determination.

passband of a bandpass filter, then the filter's output will be high compared to the case in which the stimulus does not contain frequency components in the filter's passband. Thus, a series of filters, each with a different passband region (assuming that the passbands are very narrow), can be used to analyze a complex waveform to obtain an estimate of the waveform's amplitude spectrum. Filters with high levels at their output indicate that there are frequency components in the complex waveform near the spectral region of the filters' passbands. Thus, a function relating the magnitude of the filters' output to the spectral region of their passbands is an estimate of the sound's amplitude spectrum. The narrower and steeper the filters' passbands become the better the filters estimate the sound's amplitude spectrum. The equivalent filters in the auditory system have very narrow passbands with steep slopes.

Most real sound analysis systems, including the auditory system, are nonlinear. A consequence of nonlinearity is that frequency components exist at the output of a nonlinear processor that were not present

Understanding And Treating Autism

Understanding And Treating Autism

Whenever a doctor informs the parents that their child is suffering with Autism, the first & foremost question that is thrown over him is - How did it happen? How did my child get this disease? Well, there is no definite answer to what are the exact causes of Autism.

Get My Free Ebook


Post a comment