Lesson 3 of 15
Sound Wavelength
Wavelength of Sound
Rearranging the wave equation () for wavelength:
lambda = rac{v}{f}
In air at 20 °C, m/s. So for any audible frequency:
lambda = rac{343}{f}
Why It Matters
Wavelength governs diffraction: sound bends around obstacles whose size is comparable to . Bass frequencies (long ) bend around walls; treble frequencies (short ) are more directional.
| f (Hz) | (m) | Example |
|---|---|---|
| 100 | 3.4300 | ~door width |
| 343 | 1.0000 | ~1 m |
| 440 | 0.7795 | concert A |
| 1000 | 0.3430 | ~smartphone |
Your Task
Implement soundWavelength(f) returning the wavelength in metres ( m/s).
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