Question

1) In this scale, the frequency of each C-note in vibrations per second is measured in Hz. It can be expressed as a power of 2, as shown. What is the frequency of the note C7 in exponential form and in logarithmic form?

C4: 256 Hz
C5: 512 Hz
C6: 1024 Hz

2) If the frequency of a note C is 32 vibrations per second, how many octaves higher or lower than middle C is this note?

A) 3 octaves lower
B) 4 octaves higher
C)2 octaves higher
D)1 octaves lower

Answer 1

1. For C4: in exponential, 256 = 2^28 while in log, log2(256)=8
2. 2 octaves higher middle C is this note