Question

A siren is producing a tone of frequency 10000 Hz, and a handheld decibel meter (like the one I use in class) is reading 20 dB. We've talked in class about how your perception of qualitative loudness (in phons) does not always match exactly with the meter. Using Fig 6.12 of your text to help, figure out, roughly, the "apparent loundness" (in phons) of this tone. (You may round to the nearest 5 phons. So if you think the answer is 6 phons, enter 5.)