From Wikipedia, the free encyclopedia
An audio frequency (abbreviation: AF) is any frequency from about 20 Hz to about 20 kHz, which is the approximate range of sound frequencies audible to humans. The variable whose frequency is being measured can be any physical property capable of oscillating in this frequency range, such as electric current, sound pressure in air, or mechanical vibration.
[edit] Frequencies and descriptions
| Frequency (Hz) |
Octave |
Description |
| 16 to 32 |
1st |
The human threshold of feeling, and the lowest pedal notes of a pipe organ. |
| 32 to 512 |
2nd to 5th |
Rhythm frequencies, where the lower and upper bass notes lie. |
| 512 to 2048 |
6th to 7th |
Defines human speech intelligibility, gives a horn-like or tinny quality to sound. |
| 2048 to 8192 |
8th to 9th |
Gives presence to speech, where labial and fricative sounds lie. |
| 8192 to 16000 |
10th |
Brilliance, the sounds of bells and the ringing of cymbals. In speech, the sound of the letter "S" (8000-11000 Hz) |
| MIDI Note |
Frequency (Hz) |
Description |
| C-2 |
4.09 |
Lowest note for Gregg Bailey's 64' PVC subcontrabass clarinet |
| C-1 |
8.18 |
Lowest organ note |
| C0 |
16.35 |
Lowest note for tuba, large pipe organs, Bösendorfer Imperial Grand Piano |
| C1 |
32.70 |
|
| C2 |
65.41 |
Lowest note for cello |
| C3 |
130.81 |
Lowest note for viola, mandola |
| C4 |
261.63 |
Middle C |
| C5 |
523.25 |
|
| C6 |
1046.50 |
|
[edit] External links
