Wavelength is calculated using:
Wavelength = (c)/(f)
where c is the sound speed and f the
frequency. Higher frequencies have shorter wavelengths.
For tissue, use:
where F is the frequency expressed in MHz. Use this equation to verify the values in the following table:
| F (in MHz) | Wavelength (in mm) |
| 2.5 | .62 |
| 5.0 | .31 |
| 7.5 | .21 |
Information provided by: http://www.well.com