How Long Is a 8 Hz Wavelength?
A 8 Hz sound wave has a wavelength of 42.9 meters, 4290.18 cm, 140.75 feet (140 feet and 9.05 inches) or 1689.05 inches when traveling in air at 20°C (68°F).
The formula for the wavelenght is λ = c/f where:
cis the celerity (speed) of sound = 343.21 m/s or 1126.03 ft/s in air at 20°C (68°F).fis the frequency = 8 Hz
λ of 42.9 meters, or 140.75 feet.
8 Hz Wavelength Depending on Temperature
The speed of sound in air depends on temperature. Here is how the wavelenght of a 8 Hz sound wave will vary according to temperature:
| Temp (°C) | Temp (°F) | 8 Hz wavelength (m) | 8 Hz wavelength (ft) |
|---|---|---|---|
| -40 | -40 | 38.2603 | 125.5260 |
| -35 | -31 | 38.6684 | 126.8648 |
| -30 | -22 | 39.0722 | 128.1897 |
| -25 | -13 | 39.4719 | 129.5010 |
| -20 | -4 | 39.8676 | 130.7991 |
| -15 | 5 | 40.2594 | 132.0845 |
| -10 | 14 | 40.6474 | 133.3575 |
| -5 | 23 | 41.0317 | 134.6185 |
| 0 | 32 | 41.4125 | 135.8678 |
| 5 | 41 | 41.7898 | 137.1057 |
| 10 | 50 | 42.1637 | 138.3325 |
| 15 | 59 | 42.5344 | 139.5485 |
| 20 | 68 | 42.9018 | 140.7540 |
| 25 | 77 | 43.2662 | 141.9493 |
| 30 | 86 | 43.6274 | 143.1346 |
| 35 | 95 | 43.9857 | 144.3102 |
| 40 | 104 | 44.3412 | 145.4763 |
8 Hz Half Wavelength and Standing Waves
The half wavelength of a 8 Hz sound wave is 21.45 meters, 2145.09 cm, 70.38 feet (70 feet and 4.52 inches) or 844.52 inches when travelling in air at 20°C (68°F).
Modes (or standing waves) will occur at 8 Hz in rooms where two opposing walls (axial mode), edges (tangential mode) or corners (oblique mode) are spaced by a distance d = nλ/2 where:
nis a natural (positive integer greater than or equal to 1)λis the 8 Hz wavelength = 42.9 meters, or 140.75 feet in air at 20°C (68°F).
8 Hz Standing Waves Distances
| n | Distance (m) | Distance (ft) |
|---|---|---|
| 1 | 21.45 | 70.38 |
| 2 | 42.90 | 140.75 |
| 3 | 64.35 | 211.13 |
| 4 | 85.80 | 281.51 |
| 5 | 107.25 | 351.89 |
Given the relatively large 8 Hz half wavelength, standing waves will occur at that frequency in small listening rooms.
You can try to minimze the room modes at 8 Hz by trying different speaker positions, listening positions or by placing bass traps. These can absorb frequencies as low as 63 Hz.
How To Convert 8 Hz To ms
A Hz (Hertz) is a cycle (or period) per second.
Because a 8 Hz wave will ocillate 8 times per second, we can find the time of a single cycle (or period) with the formula p = 1/f where:
fis the frequency of the wave = 8 Hz
The result will be expressed in seconds, so let's multiply by 1000 to get miliseconds:
1 / 8 Hz * 1000 = 125 ms.