Question 23
The figure shows the auditory area of normal human hearing: intensity level as a function of frequency. Sound intensity is acoustic power per unit area. Use the figure to answer the questions.
Figure labels: intensity level (dB); sound frequency (Hz); sound intensity (erg/sec cm²); auditory area; threshold of pain; threshold of hearing; loudness levels.
a) Human ears respond to frequencies between … and … Hz. (1 point)
b) Can we hear a sound with intensity level 40 dB and frequency 50 Hz? (1 point)
c) What are the approximate maximum and minimum intensity levels at 1000 Hz that can be heard by human ears? (2 points)
Figure labels: intensity level (dB); sound frequency (Hz); sound intensity (erg/sec cm²); auditory area; threshold of pain; threshold of hearing; loudness levels.
a) Human ears respond to frequencies between … and … Hz. (1 point)
b) Can we hear a sound with intensity level 40 dB and frequency 50 Hz? (1 point)
c) What are the approximate maximum and minimum intensity levels at 1000 Hz that can be heard by human ears? (2 points)