3-4: 3 SEE ANSWER

Answer: E (none of the above)

You can solve this problem using the "Loudness Level" chart in this unit. You can estimate that 90 db at 2000 Hz is about 52 phons (by looking at the y-axis amount at this point). You can estimate that the 70 db at 500 Hz is about 10 phons (by looking at the y-axis at this point). 52 divided by 10 is approximately 5, so the 2000 Hz tone at 90 db is about 5 times louder than the 500 Hz tone at 70 db, which is not an answer given.

1. REDIRECT 3-4 Loudness Level