13.4 Math and Music

Select the most representative decibel value for each of the following sounds:

1. car wash: 25 dB, 55 dB, 85 dB
2. vacuum cleaner: 15 dB, 70 dB, 90 dB
3. ship’s engine room: 30 dB, 65 dB, 95 dB
4. approaching subway car: 70 dB, 100 dB, 120 dB

Name which keys are one half-step up and one half-step down from the following:

1. D
2. E
3. G#

Name which keys are one whole step up and one whole step down from the following:

1. F^#
2. E
3. A^♭

List the 12 notes forming an octave, beginning with the note C.

Given that the frequency of C₄ is 262 Hz, find the approximate frequency of C₆.