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Wavelength frequency convert lambda Hz sound conversion acoustics acoustic audio radio speed of sound and radio waves wave length light vacuum equation formula for frequency speed of light color spectrum - sengpielaudio Sengpiel Berlin
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Frequency and wavelength conversion acoustics sound radio light waves equation color spectrum formula for frequency - sengpielaudio
 
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● 1 − Acoustic waves or sound waves in air ●
 
Here are audio waves transmitted through air. For " radio waves and light waves " − scroll down ↓
 
Conversion : frequency f to wavelength λ and wavelength to frequency
 
c is the speed of sound waves ( *or* can be the speed of light and radio waves )

If instead of the speed of light, the speed of sound in air c = 343 m/s at 20°C is used, the following conversions apply.

Audio sound frequency  Hz     |    Wavelength  
in meter (m), feet (ft), 
 centimeter (cm) or inches (") 
 m  cm  ft?  '' 
         ↓    |             ↓
       |       
 Wavelength in meters (m)     |    Audio sound frequency  Hz
centimeters (cm)     |       
feet (ft)     |     
inches ('')     |       
                                         Speed of sound c =  m / s     ft / s at 20°C                                 
Fill out the gray box above and click on the calculation button of the respective column. The proposed speed of sound c = 343 m/s or 1125.33 ft/s can be changed here.
The currently accepted value is c = 331.29 meters per second at 0 degrees Celsius; established in 1986.

Sometimes when you switch from m to cm to ft and inch the answer is wrong the first time. Toggle between the changed values. Do a reset and try again.

Formulas and equations for sound: c = λ × f        λ = c / f = c × T        f = c / λ

Physical value  symbol   unit formula
frequency f = 1/ T  Hz = 1/s   f = c / λ  
wavelength λ m λ = c / f
time period or
cycle duration 		T = 1/ f  s T = λ / c
wave speed c m/s c = λ × f

conversion radio waves - Frequency f to Wavelength &#955 and Wavelength ? to Frequency f - sengpielaudio

Conversion of period to frequency and back

Audio spectrum

The top open range of the frequency spectrum for sound waves

Microphone sensitivity conversion - sengpielaudio

● 2 − Radio waves and light waves in a vacuum ●
 
Conversion: frequency f to wavelength λ and wavelength to frequency  
 
c is the speed of light waves and the speed of radio waves in a vacuum

If instead of the speed of sound in air, the speed of light c = 299 792 458 m/s is used, the following conversions apply.

Radio wave frequency   Hz    |   Wavelength 
in meter (m), feet (ft), 
 centimeter (cm) or inches (") 
 m  cm  ft?  '' 
↓   |   ↓
      |      
  Wavelength in meters (m)    |   Radio wave frequency    Hz
centimeters (cm)    |      
feet (ft)    |      
inches (")    |      
                                Speed of radio waves or light c =  m / s     ft / s                                  

Fill out the gray box above and click on the calculation button of the respective column.
The proposed speed of light c = 299 792 458 m/s or 983 571 056 ft/s can be changed here.

Formulas and Equations: c = λ × f        λ = c / f = c × T        f = c / λ

Wave frequency in Hz = 1/s and wavelength in nm = 10 −9 m

Wavelengh Frequency Medium - sengpielaudio

Wavelengh Frequency Medium - sengpielaudio

Spectrum of electromagnetic radiation

Radio wave frequency and microwave radiation are both forms of energy called electromagnetic radiation. Sunshine contains three other forms of electromagnetic radiation: ultraviolet rays, infrared (heat) waves, and visible light waves. These electromagnetic waves spread in a vacuum at the speed of light ≈ 300,000 km/s
as electromagnetic radiation.
 
The propagation speed of electrical signals via optical fiber is about 9/10
the speed of light, that is ≈ 270,000 km/s.
The propagation speed of electrical signals via copper cables is about 2/3
the speed of light, that is ≈ 200,000 km/s.
In theory electrical signals move at the speed of light. Cables only slow them down.
The velocity propagation factor:
VOP = 1 ⁄ √ε , Epsilon is the dielectric constant, which is for polyethylene dielectrics
(PVC) nearly 1.4 .
 
Sound is also shown at the spectrum chart, but it is no electromagnetic radiation.
Sound pressure is the deviation from the local ambient pressure (sound pressure deviation) caused by a sound wave - mainly in air. The speed of sound is 343 m/s at 20°C in air.

conversion chart Frequency to Wavelength - sengpielaudio

Spectrum of Electromagnetic Radiation

Region Wavelength
Angstroms 		Wavelength
centimeters 		Frequency
Hz 		Energy
eV
Radio > 10 9 > 10 < 3×10 9 < 10 −5
Microwave 10 9 − 10 6 10 − 0.01 3×10 9 − 3×10 12 10 −5 − 0.01  
Infrared 10 6 − 7000 0.01 − 7×10 −5 3×10 12 − 4.3×10 14 0.01 − 2
Visible   7000 − 4000     7×10 −5 − 4×10 −5     4.3×10 14 − 7.5×10 14   2 − 3
Ultraviolet 4000 − 10 4×10 −5 − 10 −7 7.5×10 14 − 3×10 17 3 − 10 3
X-Rays 10 − 0.1 10 −7 − 10 −9 3×10 17 − 3 ×10 19 10 3 − 10 5
Gamma Rays < 0.1 <10 −9 > 3×10 19 >10 5

The notation "eV" stands for electron-volts, a common unit of energy measure in atomic physics. A graphical representation of the electromagnetic spectrum is shown in the figure below.

Electromagnetic spectrum

Thus we see that visible light and gamma rays and microwaves are really the same. They are all electromagnetic radiation and they just differ in their wavelengths.
 
Sometimes the unit Ångström (angstrom) = 10 −10 m = 0.1 nm is used for wavelength.

Approximate wavelength and frequency ranges of the colors

  Color  
  		Wavelength
nm 		Frequency
THz
red 780 - 622 384 - 482
orange 622 - 597 482 - 503
yellow 597 - 577 503 - 520
green  577 - 492  520 - 610
blue 492 - 455 610 - 659
violet 455 - 390 659 - 769

1 terahertz (THz) = 10 3 GHz = 10 6 MHz = 10 12 Hz,
1 nm = 10 -3 μm = 10 -6 mm = 10 -9 m.
White light is a mixture of the colors of the visible spectra.

Sound waves and electromagnetic waves are different. Sound waves need a medium to travel through, while the electromagnetic waves do not. The properties of a sound wave depend on the properties of the medium it travels through.

Approximate speed of sound
in common materials
Medium Speed of sound
       m/s            ft/s
Air, dry at 20 °C 343  1 125
Helium at 0 °C 980 3 215
Hydrogen at 0 °C 1 280 4 200
Water at 15 °C 1 500 4 920
Lead 2 160 7 090
Concrete 3 100 10 200
Wood (soft - along the fibre) 3 800 12 500
Glass 5 500 18 500
Steel 5 800 19 000

Ohm's law as acoustic equivalent for plane progressive waves
 
Conversion of sound units (levels)

Conversion of the radio frequency to wavelength and vice versa

Enter simply the value to the left or the right side.
The calculator works in both directions of the ↔ sign.

Radio frequency f :
 Hz  		 ↔  Radio wavelength  λ :
 m 
f = c / λ   λ = c / f
Speed of light c = λ × f = 299792458 m/s
Electromagnetic waves need no transport medium.

Conversion of the acoustic frequency to wavelength and vice versa

Enter simply the value to the left or the right side.
The calculator works in both directions of the ↔ sign.
Sound frequency f :
 Hz  		 ↔  Sound wavelength  λ :
 m 
f = c / λ   λ = c / f
Speed of sound c = λ × f = 343 m/s at 20?C
Sound waves or acoustic waves need necessarily a transport medium.
 
Overtones, partials and harmonics from fundamental frequency
 
Keyboard, frequencies = Naming of musical notes, piano keys
 
Frequency domain of musical instruments and voices
 
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