please solve the question immediately
Answers
Answer:
Pitch is sensed by the position of maximum excursion along the basilar membrane. This is the ear’s spectrum analyzer. There are some 24 discrete areas, each about 1.3 mm long, and each contains approximately 1300 neurons (Scharf, 1970). These act as a set of parallel band-pass filters to separate the incoming sounds into their spectral components. Like electronic filters, the cochlear filters have bandwidths and filter skirts that overlap adjacent bands. When two tones are close enough together that there is significant overlap in their skirts, they are said to be within the same critical band. The region of influence that constitutes a critical band is illustrated in Fig. 3.4. For many phenomena it is about one-third-octave wide. The lower frequencies are sensed by the cochlea at a greater distance from the stapes. The shape of the resonance is not symmetric, having a tail that extends back along the basilar membrane (upward in frequency) from the center frequency of the band. Thus a lower-pitched sound can have a region of influence on a higher-pitched sound, but not vice versa, unless the sounds are quite close in frequency.
Answer:
Firstly the waves are generated in the perilymph present in the scala vestibuli and then in the endolymph present in the scala media. The waves in the endolymph induce a ripple in the basilar membrane. The basilar movements bend the hair cells present in the organ of Corti pressing them against the tectorial membrane