What is the wavelength of a 4MHz transducer?

This is why I asked what medium. You need speed of sound which is five times faster in water than in air.

Period = 1/f

wavelength = speed of sound * period

The medium would be soft tissue. The speed in soft tissue is 1540 m/s.

To determine the wavelength of a 4MHz transducer, we need to use the formula:

Wavelength = Speed of Sound / Frequency

The speed of sound in a medium depends on the characteristics of the medium. For example, in air at room temperature, the speed of sound is approximately 343 meters per second. However, in other mediums like water or tissues, the speed of sound can vary.

Let's assume we are working with the speed of sound in soft tissues, which is approximately 1540 meters per second. Plugging this value and the given frequency (4MHz) into the formula:

Wavelength = 1540 m/s / 4 × 10^6 Hz

Dividing 1540 m/s by 4 × 10^6 Hz, we can calculate the wavelength:

Wavelength = 0.000385 m (or approximately 0.385 mm)

Therefore, the wavelength of a 4MHz transducer in soft tissues is approximately 0.385 mm.