Referring to the Fletcher-Munson curves shown, at approximately what frequency is the human ear most sensitive at the 120 dB? Intensity level, dB 120 100 80 60 40 20 0 20 Threshold of hearing O 30 Hz O 18000 Hz 040 Hz O 10000 Hz 0 4000 Hz 120 100 80 60 40 20 0 40 60 100 200 400 1000 Frequency, Hz 4000 10 000

Referring to the Fletcher-Munson curves shown, at approximately what frequency is the human ear most sensitive at the 120 dB? Intensity level, dB 120 100 80 60 40 20 0 20 Threshold of hearing O 30 Hz O 18000 Hz 040 Hz O 10000 Hz 0 4000 Hz 120 100 80 60 40 20 0 40 60 100 200 400 1000 Frequency, Hz 4000 10 000

Biomedical Instrumentation Systems

1st Edition

ISBN:9781133478294

Author:Chatterjee

Publisher:Chatterjee

Chapter14: Instrumentation In Diagnostic Ultrasound

Section: Chapter Questions

Problem 10Q

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Table 1 below shows the threshold for hearing in the left ear of three students at the indicated range of frequencies. Draw the pure tone audiogram for the three students on a single graph with the scales as illustrated below. Comment on the reasons for the shape of the graph for student 2 and 3. Frequency in Hertz (Hz) 125 250 500 1000 2000 4000 8000 -10 10 30 70 06 110 Hearing Level in dB 4.
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