What is the unit for measuring frequency in the context of sonography?

In the context of sonography, frequency is measured in hertz. Hertz is the unit that quantifies the number of cycles per second of a waveform, which is crucial in understanding sound waves used in ultrasound imaging. In sonography, frequencies typically range from a few megahertz for medical imaging, which allows for the differentiation of tissues and provides the necessary resolution for diagnostic purposes.

The other units mentioned are not appropriate for measuring frequency. Decibels measure sound intensity or pressure level, representing a logarithmic scale of sound amplitude. Watts are a unit of power, indicating the rate of energy transfer, and are not used for frequency measurement. Volts measure electrical potential difference and, while important in electronic components of sonographic equipment, do not pertain to the concept of frequency itself. Therefore, hertz is the correct and recognized unit for frequency in sonography, making it essential for understanding how ultrasound waves behave and how they are employed in medical imaging.