ARDMS Ultrasound Physics & Instrumentation Practice Exam 2025 - Free Ultrasound Practice Questions and Study Guide

Question: 1 / 400

Which factor primarily determines the frequency of an ultrasound wave?

Size of the transducer

Type of medium

Electrical energy input

The frequency of an ultrasound wave is primarily determined by the electrical energy input that controls the transducer’s operation. When electrical energy is supplied to the transducer, it creates mechanical vibrations at a specific rate, which translates into an ultrasound wave of a certain frequency.

This relationship is rooted in the fundamental principle that frequency is defined as the number of cycles of a wave that occur in one second. The electrical energy input directly influences the vibrations produced by the transducer, thus determining the ultrasound wave's frequency.

Other factors like the size of the transducer and the type of medium do play roles in ultrasound propagation and reception but do not dictate the frequency of the wave itself. The sound wave speed is determined by the characteristics of the medium through which the sound travels, and while it impacts the wavelength of the ultrasound wave, it does not govern its frequency.

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Sound wave speed

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