# 聲

(由音波跳轉過嚟)

## 頻率

${\displaystyle p=69+12\times \log _{2}{\left({\frac {f}{440{\mbox{ Hz}}}}\right)}}$

${\displaystyle f=440\times 2^{\frac {p-69}{12}}}$

0 1 2 3 4 5 6 7 8
B#/C 16.35 32.70 65.41 130.81 261.63 523.25 1046.50 2093.00 4186.01
C#/D♭ 17.32 34.65 69.30 138.59 277.18 554.37 1108.73 2217.46 4434.92
D 18.35 36.71 73.42 146.83 293.66 587.33 1174.66 2349.32 4698.64
D#/E♭ 19.45 38.89 77.78 155.56 311.13 622.25 1244.51 2489.02 4978.03
E/F♭ 20.60 41.20 82.41 164.81 329.63 659.26 1318.51 2637.02 5274.04
E#/F 21.83 43.65 87.31 174.61 349.23 698.46 1396.91 2793.83 5587.65
F#/G♭ 23.12 46.25 92.50 185.00 369.99 739.99 1479.98 2959.96 5919.91
G 24.50 49.00 98.00 196.00 392.00 783.99 1567.99 3135.96 6271.93
G#/A♭ 25.96 51.91 103.83 207.65 415.30 830.61 1661.22 3322.44 6644.88
A 27.50 55.00 110.00 220.00 440.00 880.00 1760.00 3520.00 7040.00
A#/B♭ 29.14 58.27 116.54 233.08 466.16 932.33 1864.66 3729.31 7458.62
B/C♭ 30.87 61.74 123.47 246.94 493.88 987.77 1975.53 3951.07 7902.13

## 引述

1. wave
2. sound wave
3. oscilloscope
4. phone，粵拼fung1
5. pulmonic consonant
6. vocal folds

1. Note names, MIDI numbers and frequencies. Music acoustics.
2. Chen, Matthew Y. (2000). Tone sandhi: Patterns across Chinese dialects. Cambridge, England: Cambridge University Press.

## 註解

1. 有關呢隻漢字有兩款讀音嘅情況，可以睇睇文白異讀嘅概念。
2. 如果想睇唔屬肺部氣流音嘅輔音，可以睇睇非洲南部幾常見嘅搭嘴音