The Cochlea The tuning curves of four auditory neurons located at different posi
ID: 1997934 • Letter: T
Question
The Cochlea
The tuning curves of four auditory neurons located at different positions along the cochlea (pictured in schematic form) are graphed below. Note that the x-axis is drawn with a logarithmic scale and the units of the y-axis are dB of sound pressure level High Low frequency frequency Cochlea Basilar 100 100 r membrane 80 80 60 E 40 H E 40 20 H 20 0.1 10 40 0.1 10 40 Frequency (kHz) Frequency (kHz) a) Estimate the characteristic frequencies of the each of these neurons. b) Complete the table below with how many of these four neurons will fire in response to the pure tones with the following frequencies and intensities.Explanation / Answer
a) A = 15 kHz, B = 3.5 kHz, C = 1 kHz, D = 0.3 kHz
b)
f) Repeated exposure leading to damage of the hair cells might expect a rise in wearing of ear protection. Yet, on repetition, the affected individuals would eventually be habituated.
20dB 50dB 80dB 300 Hz 1 1 3 1000 Hz 1 3 4 3500 Hz 1 1 2 15000 Hz 1 1 1