215 Hz Wavelength

How Long Is a 215 Hz Wavelength?

A 215 Hz sound wave has a wavelength of 1.6 meters, 159.63 cm, 5.24 feet (5 feet and 2.85 inches) or 62.85 inches when traveling in air at 20°C (68°F).

The formula for the wavelenght is λ = c/f where:

• c is the celerity (speed) of sound = 343.21 m/s or 1126.03 ft/s in air at 20°C (68°F).
• f is the frequency = 215 Hz

which gives a wavelength λ of 1.6 meters, or 5.24 feet.

215 Hz Wavelength Depending on Temperature

The speed of sound in air depends on temperature. Here is how the wavelenght of a 215 Hz sound wave will vary according to temperature:

Temp (°C)	Temp (°F)	215 Hz wavelength (m)	215 Hz wavelength (ft)
-40	-40	1.4236	4.6707
-35	-31	1.4388	4.7206
-30	-22	1.4538	4.7698
-25	-13	1.4687	4.8186
-20	-4	1.4834	4.8669
-15	5	1.4980	4.9148
-10	14	1.5125	4.9621
-5	23	1.5268	5.0091
0	32	1.5409	5.0555
5	41	1.5550	5.1016
10	50	1.5689	5.1473
15	59	1.5827	5.1925
20	68	1.5963	5.2374
25	77	1.6099	5.2818
30	86	1.6233	5.3259
35	95	1.6367	5.3697
40	104	1.6499	5.4131

215 Hz Half Wavelength and Standing Waves

The half wavelength of a 215 Hz sound wave is 0.8 meters, 79.82 cm, 2.62 feet (2 feet and 7.42 inches) or 31.42 inches when travelling in air at 20°C (68°F).

Modes (or standing waves) will occur at 215 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:

• n is a natural (positive integer greater than or equal to 1)
• λ is the 215 Hz wavelength = 1.6 meters, or 5.24 feet in air at 20°C (68°F).

215 Hz Standing Waves Distances

n	Distance (m)	Distance (ft)
1	0.80	2.62
2	1.60	5.24
3	2.39	7.86
4	3.19	10.47
5	3.99	13.09
6	4.79	15.71
7	5.59	18.33
8	6.39	20.95
9	7.18	23.57
10	7.98	26.19
11	8.78	28.81
12	9.58	31.42
13	10.38	34.04
14	11.17	36.66
15	11.97	39.28
16	12.77	41.90
17	13.57	44.52
18	14.37	47.14
19	15.17	49.75

Given the relatively large 215 Hz half wavelength, standing waves will occur at that frequency in small listening rooms.

You can try to minimze the room modes at 215 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 215 Hz To ms

A Hz (Hertz) is a cycle (or period) per second.

Because a 215 Hz wave will ocillate 215 times per second, we can find the time of a single cycle (or period) with the formula p = 1/f where:

• f is the frequency of the wave = 215 Hz

The result will be expressed in seconds, so let's multiply by 1000 to get miliseconds:

1 / 215 Hz * 1000 = 4.65 ms.