The
different rhythms of the body may also be changed through sound. This is known
as entrainment and involves the ability of the more powerful rhythmic vibrations
of one object to change the less powerful rhythmic vibration of another object
and cause them to synchronize their rhythms with the first object. Through
sound, especially chanting or overtone singing, it is possible to change the
rhythmic pattern of our brain waves, as well
as our heart beat and respiration.
Different
brain wave rates have been equated to different state of consciousness. There
are four basic categories of brain waves:
1.
Beta
waves, from 14 to 20 Hz, which are found in our normal waking state of mind.
2.
Alpha
waves, from 8 to 13 Hz, which occur
when we daydream or meditate.
3.
Theta
waves, from 4 to 7 Hz, which are found in states of deep meditation and sleep,
as well in shamanic activity.
4.
Delta
waves, from 0,5 to 3 Hz, which occur in deep sleep and have been found in very
propound states of meditation and healing.
Sherry Edwards claims that the diatonic musical scale can be found in many different areas: 1) It corresponds to brain wave cluster patterns below normal hearing range. 2) The atomic weights of elements found in the human body closely correlates to the diatonic scale. 3) A musical scale using atomic weights of elements as a foundation emulates brain wave clusters at lower octaves.
Brain waves/ Sound waves in Hertz
Delta |
Theta |
Alpha |
Beta |
C-3 |
C-2 |
C-1 |
Middle C |
Note |
2.04 |
4.08 |
8.17 |
16.35 |
32.70 |
65.40 |
130.81 |
261.63 |
C |
2.16 |
4.33 |
8.66 |
17.32 |
34.64 |
69.29 |
138.59 |
277.18 |
C# |
2.29 |
4.58 |
9.17 |
18.25 |
36.70 |
73.41 |
146.83 |
293.66 |
D |
2.43 |
4.86 |
9.72 |
19.44 |
38.89 |
77.78 |
155.56 |
311.13 |
D# |
2.57 |
5.15 |
10.30 |
20.60 |
41.20 |
62.40 |
164.81 |
329.63 |
E |
2.72 |
5.45 |
10.91 |
21.82 |
43.65 |
82.40 |
174.61 |
349.23 |
F |
2.89 |
5.78 |
11.56 |
23.12 |
46.24 |
92.49 |
185.99 |
369.99 |
F# |
3,06 |
6,12 |
12,25 |
24,5 |
49 |
98 |
196 |
392 |
G |
3.24 |
6.48 |
12.97 |
25.95 |
51.91 |
103.82 |
207.65 |
415.3 |
G# |
3.43 |
6.87 |
13.75 |
27.5 |
55 |
110 |
220 |
440 |
A |
3.64 |
7.28 |
14.56 |
29.13 |
58.27 |
116.54 |
233.08 |
46616 |
A# |
3.85 |
7.71 |
15.43 |
30.86 |
61.73 |
123.47 |
246.94 |
493.88 |
B |